Page 1 (1) PHYSICS Instructions : (i) Use ball point pen only to darken the appropriate circle. (ii) Mark should be dark and should completely fill the circle. (iii) Dark only one circle for each entry. (iv) Dark the circle in the space provided only. (v) Rough work must not be done on the Answer sheet and do not use white-fluid or any other rubbing material on Answer sheet. (vi) Each question carries 4 marks. For every wrong response 1 mark shall be deducted from total score. 1. The dimensional formula of magnetic intensity is (1) [MLT –2 A –1 ] (2) [ML 2 T –3 A –1 ] (3) [ML 2 T –2 A –1 ] (4) [L –1 A] 2. The velocity-time (v–t) graph of a particle moving along x-axis is as shown. It can be concluded that t v (1) Acceleration of the particle continuously decreases (2) Position of the particle continuously increases (3) Acceleration remains constant (4) Both (1) & (2) 3. The position co-ordinate of a particle moving along y-axis as a function of time t (in second) is given as y = (t – 3) 2 – 6 (metre). The distance covered by the particle in first four second is (1) 5 m (2) 10 m (3) 7 m (4) 9 m Choose the correct answer : 4. For a projectile motion in x-y plane on some planet the position co-ordinates as a function of time t are given as x = 4t and y = 4t – 6t 2 , where x, y are in metre and time t is in second. Assume x is horizontal and y is vertical. The horizontal range of the projectile is (1) 3 m 8 (2) 6 m (3) 8 m 3 (4) 16 m 3 5. For a particle moving on a circle of radius 18 m, the distance covered s as a function of time t is given as s = 3t 2 (s is in metre and t is in second). The acceleration of the particle at t = 2 second is (1) 6 m/s 2 (2) 8 m/s 2 (3) 10 m/s 2 (4) 14 m/s 2 6. A water pump of 0.5 horse power is required to flow water through a cylindrical pipe line at 1 m/s. If flow rate of water is to be doubled then the power of new water pump required is (1) 1 HP (2) 2 HP (3) 4 HP (4) 8 HP Regd. Office: Aakash Tower, 8, Pusa Road, New Delhi-110005, Ph. 011-47623456 MM : 720 Mock Test for NEET - 2020 Time : 3 Hrs. Home Assignment – 3 18/06/2020 Page 2 (1) PHYSICS Instructions : (i) Use ball point pen only to darken the appropriate circle. (ii) Mark should be dark and should completely fill the circle. (iii) Dark only one circle for each entry. (iv) Dark the circle in the space provided only. (v) Rough work must not be done on the Answer sheet and do not use white-fluid or any other rubbing material on Answer sheet. (vi) Each question carries 4 marks. For every wrong response 1 mark shall be deducted from total score. 1. The dimensional formula of magnetic intensity is (1) [MLT –2 A –1 ] (2) [ML 2 T –3 A –1 ] (3) [ML 2 T –2 A –1 ] (4) [L –1 A] 2. The velocity-time (v–t) graph of a particle moving along x-axis is as shown. It can be concluded that t v (1) Acceleration of the particle continuously decreases (2) Position of the particle continuously increases (3) Acceleration remains constant (4) Both (1) & (2) 3. The position co-ordinate of a particle moving along y-axis as a function of time t (in second) is given as y = (t – 3) 2 – 6 (metre). The distance covered by the particle in first four second is (1) 5 m (2) 10 m (3) 7 m (4) 9 m Choose the correct answer : 4. For a projectile motion in x-y plane on some planet the position co-ordinates as a function of time t are given as x = 4t and y = 4t – 6t 2 , where x, y are in metre and time t is in second. Assume x is horizontal and y is vertical. The horizontal range of the projectile is (1) 3 m 8 (2) 6 m (3) 8 m 3 (4) 16 m 3 5. For a particle moving on a circle of radius 18 m, the distance covered s as a function of time t is given as s = 3t 2 (s is in metre and t is in second). The acceleration of the particle at t = 2 second is (1) 6 m/s 2 (2) 8 m/s 2 (3) 10 m/s 2 (4) 14 m/s 2 6. A water pump of 0.5 horse power is required to flow water through a cylindrical pipe line at 1 m/s. If flow rate of water is to be doubled then the power of new water pump required is (1) 1 HP (2) 2 HP (3) 4 HP (4) 8 HP Regd. Office: Aakash Tower, 8, Pusa Road, New Delhi-110005, Ph. 011-47623456 MM : 720 Mock Test for NEET - 2020 Time : 3 Hrs. Home Assignment – 3 18/06/2020 (2) Home Assignment-3 Mock Test for NEET - 2020 7. A slab of mass m 1 = 30 kg is kept over a smooth horizontal surface above which a block of mass m 2 = 10 kg has been kept as shown. The coefficient of friction ? between the block and the slab is 0.5. A horizontal force F acts on the block. The value of F for which both the masses will move together is (g = 10 m/s 2 ) m 1 F ? m 2 Smooth (1) 50 N (2) 200 N 3 (3) 100 N 3 (4) All of these 8. A block of mass m = 5 kg is kept on a horizontal rough platform undergoing rotation. If coefficient of friction between the block and the platform is 0.4 and the block is rotating in a circle of radius 4 m then its possible time period (in second) may be (g = 10 m/s 2 ) (1) ? (2) 3 ? (3) 4 ? (4) Both (2) & (3) 9. A bomb of 10 kg at rest explodes in two parts. One part of 4 kg moves with kinetic energy 72 J. Kinetic energy of the other part just after explosion is (1) 72 J (2) 48 J (3) 120 J (4) 108 J 10. A solid sphere of mass 2 kg and radius 2 cm is rolling down a rough incline of inclination ? = 30º. The acceleration of its centre down the incline is (g = 10 m/s 2 ) (1) 5 m/s 2 (2) 25 7 m/s 2 (3) 3 m/s 2 (4) 7 m/s 2 11. You have been given the standard stress-strain diagram of a steel rod sample of known dimensions. The physical quantity that can be calculated from the diagram is (1) Young’s modulus of elasticity (2) Breaking stress (3) Stored energy density in the sample (4) All of these 12. By the side of a lake the mercury in a barometer stands at 75 cm. Mercury used in the barometer has specific gravity of 40 3 . The volume of an air bubble increases by 50% while travelling from the bottom to the top of the lake. The depth of the water lake is approximately. (1) 5 m (2) 10 m (3) 70 m (4) 15 m 13. In a large rectangular water tank, water is coming out of a small hole at the bottom of the tank. It takes almost 4 min to empty half of the tank. How much approximate further time will be needed to empty the tank completely? (1) 4 min (2) 6 min (3) 10 min (4) 8 min 14. A small solid ball is projected vertically up from ground at a large initial speed 3 2 u= gR , where g is acceleration due to gravity on the surface of the earth and R is earth’s radius. The maximum altitude upto which the ball will go is (neglect air friction) (1) 2 R (2) 3 R (3) 2 3 R (4) 3 4 R 15. The volume flow rate of a viscous liquid through a horizontal cylindrical capillary is P. If all the linear dimensions of the capillary is doubled (keeping other factors same) then the new volume flow rate will be (1) P (2) 4P (3) 8P (4) 16P 16. A steel scale (calibrated at 25°C) has been employed to measure the length of a copper pipe at 25°C. However the reading has been taken at 45ºC. If thermal coefficient of linear expansion of steel and copper are 3 × 10 –5 per ºC and 2 × 10 –5 per ºC respectively then percentage error in reading taken is (1) 0.01% (2) 0.02% (3) 0.04% (4) 0.05% 17. A thermodynamic cyclic process abcd has two isothermals, one isobaric and one isochoric process as shown on pressure-volume (P–V) diagram. ab c d V P Page 3 (1) PHYSICS Instructions : (i) Use ball point pen only to darken the appropriate circle. (ii) Mark should be dark and should completely fill the circle. (iii) Dark only one circle for each entry. (iv) Dark the circle in the space provided only. (v) Rough work must not be done on the Answer sheet and do not use white-fluid or any other rubbing material on Answer sheet. (vi) Each question carries 4 marks. For every wrong response 1 mark shall be deducted from total score. 1. The dimensional formula of magnetic intensity is (1) [MLT –2 A –1 ] (2) [ML 2 T –3 A –1 ] (3) [ML 2 T –2 A –1 ] (4) [L –1 A] 2. The velocity-time (v–t) graph of a particle moving along x-axis is as shown. It can be concluded that t v (1) Acceleration of the particle continuously decreases (2) Position of the particle continuously increases (3) Acceleration remains constant (4) Both (1) & (2) 3. The position co-ordinate of a particle moving along y-axis as a function of time t (in second) is given as y = (t – 3) 2 – 6 (metre). The distance covered by the particle in first four second is (1) 5 m (2) 10 m (3) 7 m (4) 9 m Choose the correct answer : 4. For a projectile motion in x-y plane on some planet the position co-ordinates as a function of time t are given as x = 4t and y = 4t – 6t 2 , where x, y are in metre and time t is in second. Assume x is horizontal and y is vertical. The horizontal range of the projectile is (1) 3 m 8 (2) 6 m (3) 8 m 3 (4) 16 m 3 5. For a particle moving on a circle of radius 18 m, the distance covered s as a function of time t is given as s = 3t 2 (s is in metre and t is in second). The acceleration of the particle at t = 2 second is (1) 6 m/s 2 (2) 8 m/s 2 (3) 10 m/s 2 (4) 14 m/s 2 6. A water pump of 0.5 horse power is required to flow water through a cylindrical pipe line at 1 m/s. If flow rate of water is to be doubled then the power of new water pump required is (1) 1 HP (2) 2 HP (3) 4 HP (4) 8 HP Regd. Office: Aakash Tower, 8, Pusa Road, New Delhi-110005, Ph. 011-47623456 MM : 720 Mock Test for NEET - 2020 Time : 3 Hrs. Home Assignment – 3 18/06/2020 (2) Home Assignment-3 Mock Test for NEET - 2020 7. A slab of mass m 1 = 30 kg is kept over a smooth horizontal surface above which a block of mass m 2 = 10 kg has been kept as shown. The coefficient of friction ? between the block and the slab is 0.5. A horizontal force F acts on the block. The value of F for which both the masses will move together is (g = 10 m/s 2 ) m 1 F ? m 2 Smooth (1) 50 N (2) 200 N 3 (3) 100 N 3 (4) All of these 8. A block of mass m = 5 kg is kept on a horizontal rough platform undergoing rotation. If coefficient of friction between the block and the platform is 0.4 and the block is rotating in a circle of radius 4 m then its possible time period (in second) may be (g = 10 m/s 2 ) (1) ? (2) 3 ? (3) 4 ? (4) Both (2) & (3) 9. A bomb of 10 kg at rest explodes in two parts. One part of 4 kg moves with kinetic energy 72 J. Kinetic energy of the other part just after explosion is (1) 72 J (2) 48 J (3) 120 J (4) 108 J 10. A solid sphere of mass 2 kg and radius 2 cm is rolling down a rough incline of inclination ? = 30º. The acceleration of its centre down the incline is (g = 10 m/s 2 ) (1) 5 m/s 2 (2) 25 7 m/s 2 (3) 3 m/s 2 (4) 7 m/s 2 11. You have been given the standard stress-strain diagram of a steel rod sample of known dimensions. The physical quantity that can be calculated from the diagram is (1) Young’s modulus of elasticity (2) Breaking stress (3) Stored energy density in the sample (4) All of these 12. By the side of a lake the mercury in a barometer stands at 75 cm. Mercury used in the barometer has specific gravity of 40 3 . The volume of an air bubble increases by 50% while travelling from the bottom to the top of the lake. The depth of the water lake is approximately. (1) 5 m (2) 10 m (3) 70 m (4) 15 m 13. In a large rectangular water tank, water is coming out of a small hole at the bottom of the tank. It takes almost 4 min to empty half of the tank. How much approximate further time will be needed to empty the tank completely? (1) 4 min (2) 6 min (3) 10 min (4) 8 min 14. A small solid ball is projected vertically up from ground at a large initial speed 3 2 u= gR , where g is acceleration due to gravity on the surface of the earth and R is earth’s radius. The maximum altitude upto which the ball will go is (neglect air friction) (1) 2 R (2) 3 R (3) 2 3 R (4) 3 4 R 15. The volume flow rate of a viscous liquid through a horizontal cylindrical capillary is P. If all the linear dimensions of the capillary is doubled (keeping other factors same) then the new volume flow rate will be (1) P (2) 4P (3) 8P (4) 16P 16. A steel scale (calibrated at 25°C) has been employed to measure the length of a copper pipe at 25°C. However the reading has been taken at 45ºC. If thermal coefficient of linear expansion of steel and copper are 3 × 10 –5 per ºC and 2 × 10 –5 per ºC respectively then percentage error in reading taken is (1) 0.01% (2) 0.02% (3) 0.04% (4) 0.05% 17. A thermodynamic cyclic process abcd has two isothermals, one isobaric and one isochoric process as shown on pressure-volume (P–V) diagram. ab c d V P (3) Mock Test for NEET - 2020 Home Assignment-3 The same cyclic process on a volume-temperature (V – T) diagram is best represented by (1) (2) V b a d c T (3) (4) c da b 18. If the source as well as sink temperature of a heat engine is increased then the efficiency of the ideal engine (1) May increase (2) May decrease (3) May remain unchanged (4) Any of these 19. From a uniform circular plate of radius R and area A, a small circular portion of area 21 A is cut out at a distance 3 4 R from the centre O as shown. The centre of mass of leftover disc is at a distance x from O, where x is (1) 3 84 R O 3 4 R R (2) 21 R (3) 3 80 R (4) 20 R 20. A vertical spring of constant k is kept fixed on a horizontal ground. A block of mass 1 kg is kept at the top of the spring and gently released. The compression produced in the spring at equilibrium is 2 cm. Had the mass been suddenly released, the maximum compression in the spring would be (1) 1 cm (2) 2 cm (3) 4 cm (4) 8 cm 21. A train moving at 72 kmph is approaching a hill while blowing horn at 1.24 kHz. The frequency of sound (reflected by the hill) as heard by the driver of the train is (take speed of sound in air = 330 m/s) (1) 1370 Hz (2) 1400 Hz (3) 1290 Hz (4) 1600 Hz 22. Four organ pipes of equal length have their overtones as shown. Frequency ratio of sound waves in them is (a) (b) (c) (d) (1) 4 : 3 : 2 : 1 (2) 6 : 5 : 4 : 3 (3) 8 : 7 : 6 : 5 (4) 5 : 3 : 2 : 1 23. A particle is undergoing simple harmonic motion on a straight line of amplitude 1 cm and time period 8 second. Starting from mean position the distance covered by the particle in first five seconds is approximately. (1) 2.1 cm (2) 2.3 cm (3) 2.5 cm (4) 2.7 cm 24. In which of the following motions the time T will have approximate value of 84.6 minute? a. Time period T of a satellite rotating very close to the surface of the earth. b. Time period T of rotation of the earth so that a body kept on equator feels weightlessness. c. Time period T of oscillation of an infinitely large simple pendulum. d. Time period T of oscillation of a body along a complete tunnel through a chord of the earth. (1) a, b, c (2) a, b, c, d (3) a, b (4) b, c 25. A plastic cylinder of mass M and cross-sectional area A is undergoing vertical SHM while floating in a liquid of density d. The time period of oscillation can be increased by increasing (1) M (2) A (3) d (4) All of these 26. A parallel plate capacitor with dielectric is charged completely and then the battery is disconnected. Now the dielectric is pulled out. Due to such pulling the (1) Charge stored on the capacitor will decrease (2) Potential difference between the plates will decrease (3) Capacitance will increase (4) Energy stored in the capacitor will increase Page 4 (1) PHYSICS Instructions : (i) Use ball point pen only to darken the appropriate circle. (ii) Mark should be dark and should completely fill the circle. (iii) Dark only one circle for each entry. (iv) Dark the circle in the space provided only. (v) Rough work must not be done on the Answer sheet and do not use white-fluid or any other rubbing material on Answer sheet. (vi) Each question carries 4 marks. For every wrong response 1 mark shall be deducted from total score. 1. The dimensional formula of magnetic intensity is (1) [MLT –2 A –1 ] (2) [ML 2 T –3 A –1 ] (3) [ML 2 T –2 A –1 ] (4) [L –1 A] 2. The velocity-time (v–t) graph of a particle moving along x-axis is as shown. It can be concluded that t v (1) Acceleration of the particle continuously decreases (2) Position of the particle continuously increases (3) Acceleration remains constant (4) Both (1) & (2) 3. The position co-ordinate of a particle moving along y-axis as a function of time t (in second) is given as y = (t – 3) 2 – 6 (metre). The distance covered by the particle in first four second is (1) 5 m (2) 10 m (3) 7 m (4) 9 m Choose the correct answer : 4. For a projectile motion in x-y plane on some planet the position co-ordinates as a function of time t are given as x = 4t and y = 4t – 6t 2 , where x, y are in metre and time t is in second. Assume x is horizontal and y is vertical. The horizontal range of the projectile is (1) 3 m 8 (2) 6 m (3) 8 m 3 (4) 16 m 3 5. For a particle moving on a circle of radius 18 m, the distance covered s as a function of time t is given as s = 3t 2 (s is in metre and t is in second). The acceleration of the particle at t = 2 second is (1) 6 m/s 2 (2) 8 m/s 2 (3) 10 m/s 2 (4) 14 m/s 2 6. A water pump of 0.5 horse power is required to flow water through a cylindrical pipe line at 1 m/s. If flow rate of water is to be doubled then the power of new water pump required is (1) 1 HP (2) 2 HP (3) 4 HP (4) 8 HP Regd. Office: Aakash Tower, 8, Pusa Road, New Delhi-110005, Ph. 011-47623456 MM : 720 Mock Test for NEET - 2020 Time : 3 Hrs. Home Assignment – 3 18/06/2020 (2) Home Assignment-3 Mock Test for NEET - 2020 7. A slab of mass m 1 = 30 kg is kept over a smooth horizontal surface above which a block of mass m 2 = 10 kg has been kept as shown. The coefficient of friction ? between the block and the slab is 0.5. A horizontal force F acts on the block. The value of F for which both the masses will move together is (g = 10 m/s 2 ) m 1 F ? m 2 Smooth (1) 50 N (2) 200 N 3 (3) 100 N 3 (4) All of these 8. A block of mass m = 5 kg is kept on a horizontal rough platform undergoing rotation. If coefficient of friction between the block and the platform is 0.4 and the block is rotating in a circle of radius 4 m then its possible time period (in second) may be (g = 10 m/s 2 ) (1) ? (2) 3 ? (3) 4 ? (4) Both (2) & (3) 9. A bomb of 10 kg at rest explodes in two parts. One part of 4 kg moves with kinetic energy 72 J. Kinetic energy of the other part just after explosion is (1) 72 J (2) 48 J (3) 120 J (4) 108 J 10. A solid sphere of mass 2 kg and radius 2 cm is rolling down a rough incline of inclination ? = 30º. The acceleration of its centre down the incline is (g = 10 m/s 2 ) (1) 5 m/s 2 (2) 25 7 m/s 2 (3) 3 m/s 2 (4) 7 m/s 2 11. You have been given the standard stress-strain diagram of a steel rod sample of known dimensions. The physical quantity that can be calculated from the diagram is (1) Young’s modulus of elasticity (2) Breaking stress (3) Stored energy density in the sample (4) All of these 12. By the side of a lake the mercury in a barometer stands at 75 cm. Mercury used in the barometer has specific gravity of 40 3 . The volume of an air bubble increases by 50% while travelling from the bottom to the top of the lake. The depth of the water lake is approximately. (1) 5 m (2) 10 m (3) 70 m (4) 15 m 13. In a large rectangular water tank, water is coming out of a small hole at the bottom of the tank. It takes almost 4 min to empty half of the tank. How much approximate further time will be needed to empty the tank completely? (1) 4 min (2) 6 min (3) 10 min (4) 8 min 14. A small solid ball is projected vertically up from ground at a large initial speed 3 2 u= gR , where g is acceleration due to gravity on the surface of the earth and R is earth’s radius. The maximum altitude upto which the ball will go is (neglect air friction) (1) 2 R (2) 3 R (3) 2 3 R (4) 3 4 R 15. The volume flow rate of a viscous liquid through a horizontal cylindrical capillary is P. If all the linear dimensions of the capillary is doubled (keeping other factors same) then the new volume flow rate will be (1) P (2) 4P (3) 8P (4) 16P 16. A steel scale (calibrated at 25°C) has been employed to measure the length of a copper pipe at 25°C. However the reading has been taken at 45ºC. If thermal coefficient of linear expansion of steel and copper are 3 × 10 –5 per ºC and 2 × 10 –5 per ºC respectively then percentage error in reading taken is (1) 0.01% (2) 0.02% (3) 0.04% (4) 0.05% 17. A thermodynamic cyclic process abcd has two isothermals, one isobaric and one isochoric process as shown on pressure-volume (P–V) diagram. ab c d V P (3) Mock Test for NEET - 2020 Home Assignment-3 The same cyclic process on a volume-temperature (V – T) diagram is best represented by (1) (2) V b a d c T (3) (4) c da b 18. If the source as well as sink temperature of a heat engine is increased then the efficiency of the ideal engine (1) May increase (2) May decrease (3) May remain unchanged (4) Any of these 19. From a uniform circular plate of radius R and area A, a small circular portion of area 21 A is cut out at a distance 3 4 R from the centre O as shown. The centre of mass of leftover disc is at a distance x from O, where x is (1) 3 84 R O 3 4 R R (2) 21 R (3) 3 80 R (4) 20 R 20. A vertical spring of constant k is kept fixed on a horizontal ground. A block of mass 1 kg is kept at the top of the spring and gently released. The compression produced in the spring at equilibrium is 2 cm. Had the mass been suddenly released, the maximum compression in the spring would be (1) 1 cm (2) 2 cm (3) 4 cm (4) 8 cm 21. A train moving at 72 kmph is approaching a hill while blowing horn at 1.24 kHz. The frequency of sound (reflected by the hill) as heard by the driver of the train is (take speed of sound in air = 330 m/s) (1) 1370 Hz (2) 1400 Hz (3) 1290 Hz (4) 1600 Hz 22. Four organ pipes of equal length have their overtones as shown. Frequency ratio of sound waves in them is (a) (b) (c) (d) (1) 4 : 3 : 2 : 1 (2) 6 : 5 : 4 : 3 (3) 8 : 7 : 6 : 5 (4) 5 : 3 : 2 : 1 23. A particle is undergoing simple harmonic motion on a straight line of amplitude 1 cm and time period 8 second. Starting from mean position the distance covered by the particle in first five seconds is approximately. (1) 2.1 cm (2) 2.3 cm (3) 2.5 cm (4) 2.7 cm 24. In which of the following motions the time T will have approximate value of 84.6 minute? a. Time period T of a satellite rotating very close to the surface of the earth. b. Time period T of rotation of the earth so that a body kept on equator feels weightlessness. c. Time period T of oscillation of an infinitely large simple pendulum. d. Time period T of oscillation of a body along a complete tunnel through a chord of the earth. (1) a, b, c (2) a, b, c, d (3) a, b (4) b, c 25. A plastic cylinder of mass M and cross-sectional area A is undergoing vertical SHM while floating in a liquid of density d. The time period of oscillation can be increased by increasing (1) M (2) A (3) d (4) All of these 26. A parallel plate capacitor with dielectric is charged completely and then the battery is disconnected. Now the dielectric is pulled out. Due to such pulling the (1) Charge stored on the capacitor will decrease (2) Potential difference between the plates will decrease (3) Capacitance will increase (4) Energy stored in the capacitor will increase (4) Home Assignment-3 Mock Test for NEET - 2020 27. The electric potential V as a function of position (x, y, z) in a space is given by V = xy 2 z 3 (volt). The electric field (in N/C) at point P(1, 2, –1) m will be given as (1) ˆˆ ˆ 48 12 ij k ?? (2) ˆˆ ˆ 44 8 ij k ?? (3) ˆˆ ˆ 4412 ij k ?? (4) ˆˆ ˆ 44 12 ij k ?? 28. A portion of electrical network is as shown in figure. The energy stored in the capacitor is 2 A 1 ? 2 ? 1 ? 1 ? 2 ? 1 A 5 ? 7 ? 1 A 2 F ? (1) 12 ?J (2) 288 ?J (3) 144 ?J (4) 72 ?J 29. In the electrical circuit shown, the bulb B 1 of resistance 200 ? glows at 40 W. The bulb B 2 of resistance 300 ??will glow at R = 400 ? B 1 B 2 ii (1) 40 W (2) 80 W (3) 160 W (4) 240 W 30. In the standard notations the Bohr’s Magneton is expressed as (1) eh m ? (2) 2 eh m ? (3) 4 eh m ? (4) 4eh m ? 31. A regular hexagonal loop of side a is formed by a uniform wire. A current flows into it as shown. The magnetic field at the centre C of the hexagon is (1) 0 16 i a ? ? a C i i (2) 0 24 i a ? ? (3) 0 3 8 i a ? ? (4) Zero 32. The magnetic dip angle at magnetic equator of the earth is (1) 0º (2) 30º (3) 45º (4) 90º 33. A metallic slider of length L is moving on wire frame with resistance R (kept in uniform magnetic field B) at a speed v as shown. Force F applied by external agent in pulling this slider is B F R (1) BLv R (2) 2 BLv R (3) 22 BLv R (4) 22 2 BLv R 34. In the circuit shown the power consumed by the bulb B 1 long time after the key K is closed is (inductor is ideal) B 2 = 5 ? B 1 = 5 ? 10 volt K L = 5 mH (1) 5 W (2) 10 W (3) 20 W (4) 40 W 35. Across a capacitor C = 10 ?F the voltage is changing at a rate of 200 volt/second. The displacement current in the capacitor is (1) 20 mA (2) 2 mA (3) 2 A (4) 20 A Page 5 (1) PHYSICS Instructions : (i) Use ball point pen only to darken the appropriate circle. (ii) Mark should be dark and should completely fill the circle. (iii) Dark only one circle for each entry. (iv) Dark the circle in the space provided only. (v) Rough work must not be done on the Answer sheet and do not use white-fluid or any other rubbing material on Answer sheet. (vi) Each question carries 4 marks. For every wrong response 1 mark shall be deducted from total score. 1. The dimensional formula of magnetic intensity is (1) [MLT –2 A –1 ] (2) [ML 2 T –3 A –1 ] (3) [ML 2 T –2 A –1 ] (4) [L –1 A] 2. The velocity-time (v–t) graph of a particle moving along x-axis is as shown. It can be concluded that t v (1) Acceleration of the particle continuously decreases (2) Position of the particle continuously increases (3) Acceleration remains constant (4) Both (1) & (2) 3. The position co-ordinate of a particle moving along y-axis as a function of time t (in second) is given as y = (t – 3) 2 – 6 (metre). The distance covered by the particle in first four second is (1) 5 m (2) 10 m (3) 7 m (4) 9 m Choose the correct answer : 4. For a projectile motion in x-y plane on some planet the position co-ordinates as a function of time t are given as x = 4t and y = 4t – 6t 2 , where x, y are in metre and time t is in second. Assume x is horizontal and y is vertical. The horizontal range of the projectile is (1) 3 m 8 (2) 6 m (3) 8 m 3 (4) 16 m 3 5. For a particle moving on a circle of radius 18 m, the distance covered s as a function of time t is given as s = 3t 2 (s is in metre and t is in second). The acceleration of the particle at t = 2 second is (1) 6 m/s 2 (2) 8 m/s 2 (3) 10 m/s 2 (4) 14 m/s 2 6. A water pump of 0.5 horse power is required to flow water through a cylindrical pipe line at 1 m/s. If flow rate of water is to be doubled then the power of new water pump required is (1) 1 HP (2) 2 HP (3) 4 HP (4) 8 HP Regd. Office: Aakash Tower, 8, Pusa Road, New Delhi-110005, Ph. 011-47623456 MM : 720 Mock Test for NEET - 2020 Time : 3 Hrs. Home Assignment – 3 18/06/2020 (2) Home Assignment-3 Mock Test for NEET - 2020 7. A slab of mass m 1 = 30 kg is kept over a smooth horizontal surface above which a block of mass m 2 = 10 kg has been kept as shown. The coefficient of friction ? between the block and the slab is 0.5. A horizontal force F acts on the block. The value of F for which both the masses will move together is (g = 10 m/s 2 ) m 1 F ? m 2 Smooth (1) 50 N (2) 200 N 3 (3) 100 N 3 (4) All of these 8. A block of mass m = 5 kg is kept on a horizontal rough platform undergoing rotation. If coefficient of friction between the block and the platform is 0.4 and the block is rotating in a circle of radius 4 m then its possible time period (in second) may be (g = 10 m/s 2 ) (1) ? (2) 3 ? (3) 4 ? (4) Both (2) & (3) 9. A bomb of 10 kg at rest explodes in two parts. One part of 4 kg moves with kinetic energy 72 J. Kinetic energy of the other part just after explosion is (1) 72 J (2) 48 J (3) 120 J (4) 108 J 10. A solid sphere of mass 2 kg and radius 2 cm is rolling down a rough incline of inclination ? = 30º. The acceleration of its centre down the incline is (g = 10 m/s 2 ) (1) 5 m/s 2 (2) 25 7 m/s 2 (3) 3 m/s 2 (4) 7 m/s 2 11. You have been given the standard stress-strain diagram of a steel rod sample of known dimensions. The physical quantity that can be calculated from the diagram is (1) Young’s modulus of elasticity (2) Breaking stress (3) Stored energy density in the sample (4) All of these 12. By the side of a lake the mercury in a barometer stands at 75 cm. Mercury used in the barometer has specific gravity of 40 3 . The volume of an air bubble increases by 50% while travelling from the bottom to the top of the lake. The depth of the water lake is approximately. (1) 5 m (2) 10 m (3) 70 m (4) 15 m 13. In a large rectangular water tank, water is coming out of a small hole at the bottom of the tank. It takes almost 4 min to empty half of the tank. How much approximate further time will be needed to empty the tank completely? (1) 4 min (2) 6 min (3) 10 min (4) 8 min 14. A small solid ball is projected vertically up from ground at a large initial speed 3 2 u= gR , where g is acceleration due to gravity on the surface of the earth and R is earth’s radius. The maximum altitude upto which the ball will go is (neglect air friction) (1) 2 R (2) 3 R (3) 2 3 R (4) 3 4 R 15. The volume flow rate of a viscous liquid through a horizontal cylindrical capillary is P. If all the linear dimensions of the capillary is doubled (keeping other factors same) then the new volume flow rate will be (1) P (2) 4P (3) 8P (4) 16P 16. A steel scale (calibrated at 25°C) has been employed to measure the length of a copper pipe at 25°C. However the reading has been taken at 45ºC. If thermal coefficient of linear expansion of steel and copper are 3 × 10 –5 per ºC and 2 × 10 –5 per ºC respectively then percentage error in reading taken is (1) 0.01% (2) 0.02% (3) 0.04% (4) 0.05% 17. A thermodynamic cyclic process abcd has two isothermals, one isobaric and one isochoric process as shown on pressure-volume (P–V) diagram. ab c d V P (3) Mock Test for NEET - 2020 Home Assignment-3 The same cyclic process on a volume-temperature (V – T) diagram is best represented by (1) (2) V b a d c T (3) (4) c da b 18. If the source as well as sink temperature of a heat engine is increased then the efficiency of the ideal engine (1) May increase (2) May decrease (3) May remain unchanged (4) Any of these 19. From a uniform circular plate of radius R and area A, a small circular portion of area 21 A is cut out at a distance 3 4 R from the centre O as shown. The centre of mass of leftover disc is at a distance x from O, where x is (1) 3 84 R O 3 4 R R (2) 21 R (3) 3 80 R (4) 20 R 20. A vertical spring of constant k is kept fixed on a horizontal ground. A block of mass 1 kg is kept at the top of the spring and gently released. The compression produced in the spring at equilibrium is 2 cm. Had the mass been suddenly released, the maximum compression in the spring would be (1) 1 cm (2) 2 cm (3) 4 cm (4) 8 cm 21. A train moving at 72 kmph is approaching a hill while blowing horn at 1.24 kHz. The frequency of sound (reflected by the hill) as heard by the driver of the train is (take speed of sound in air = 330 m/s) (1) 1370 Hz (2) 1400 Hz (3) 1290 Hz (4) 1600 Hz 22. Four organ pipes of equal length have their overtones as shown. Frequency ratio of sound waves in them is (a) (b) (c) (d) (1) 4 : 3 : 2 : 1 (2) 6 : 5 : 4 : 3 (3) 8 : 7 : 6 : 5 (4) 5 : 3 : 2 : 1 23. A particle is undergoing simple harmonic motion on a straight line of amplitude 1 cm and time period 8 second. Starting from mean position the distance covered by the particle in first five seconds is approximately. (1) 2.1 cm (2) 2.3 cm (3) 2.5 cm (4) 2.7 cm 24. In which of the following motions the time T will have approximate value of 84.6 minute? a. Time period T of a satellite rotating very close to the surface of the earth. b. Time period T of rotation of the earth so that a body kept on equator feels weightlessness. c. Time period T of oscillation of an infinitely large simple pendulum. d. Time period T of oscillation of a body along a complete tunnel through a chord of the earth. (1) a, b, c (2) a, b, c, d (3) a, b (4) b, c 25. A plastic cylinder of mass M and cross-sectional area A is undergoing vertical SHM while floating in a liquid of density d. The time period of oscillation can be increased by increasing (1) M (2) A (3) d (4) All of these 26. A parallel plate capacitor with dielectric is charged completely and then the battery is disconnected. Now the dielectric is pulled out. Due to such pulling the (1) Charge stored on the capacitor will decrease (2) Potential difference between the plates will decrease (3) Capacitance will increase (4) Energy stored in the capacitor will increase (4) Home Assignment-3 Mock Test for NEET - 2020 27. The electric potential V as a function of position (x, y, z) in a space is given by V = xy 2 z 3 (volt). The electric field (in N/C) at point P(1, 2, –1) m will be given as (1) ˆˆ ˆ 48 12 ij k ?? (2) ˆˆ ˆ 44 8 ij k ?? (3) ˆˆ ˆ 4412 ij k ?? (4) ˆˆ ˆ 44 12 ij k ?? 28. A portion of electrical network is as shown in figure. The energy stored in the capacitor is 2 A 1 ? 2 ? 1 ? 1 ? 2 ? 1 A 5 ? 7 ? 1 A 2 F ? (1) 12 ?J (2) 288 ?J (3) 144 ?J (4) 72 ?J 29. In the electrical circuit shown, the bulb B 1 of resistance 200 ? glows at 40 W. The bulb B 2 of resistance 300 ??will glow at R = 400 ? B 1 B 2 ii (1) 40 W (2) 80 W (3) 160 W (4) 240 W 30. In the standard notations the Bohr’s Magneton is expressed as (1) eh m ? (2) 2 eh m ? (3) 4 eh m ? (4) 4eh m ? 31. A regular hexagonal loop of side a is formed by a uniform wire. A current flows into it as shown. The magnetic field at the centre C of the hexagon is (1) 0 16 i a ? ? a C i i (2) 0 24 i a ? ? (3) 0 3 8 i a ? ? (4) Zero 32. The magnetic dip angle at magnetic equator of the earth is (1) 0º (2) 30º (3) 45º (4) 90º 33. A metallic slider of length L is moving on wire frame with resistance R (kept in uniform magnetic field B) at a speed v as shown. Force F applied by external agent in pulling this slider is B F R (1) BLv R (2) 2 BLv R (3) 22 BLv R (4) 22 2 BLv R 34. In the circuit shown the power consumed by the bulb B 1 long time after the key K is closed is (inductor is ideal) B 2 = 5 ? B 1 = 5 ? 10 volt K L = 5 mH (1) 5 W (2) 10 W (3) 20 W (4) 40 W 35. Across a capacitor C = 10 ?F the voltage is changing at a rate of 200 volt/second. The displacement current in the capacitor is (1) 20 mA (2) 2 mA (3) 2 A (4) 20 A (5) Mock Test for NEET - 2020 Home Assignment-3 36. In the situation shown the distance between the object O and its image is 24 cm. The object is 6 cm above water level and the beaker containing water upto 8 cm is kept on a plane mirror. Refractive index of the water is 6 cm O Water 8 cm Mirror (1) 3 2 (2) 4 3 (3) 5 4 (4) 7 6 37. A parallel beam of light enters a convex lens of focal length 50 cm. A concave lens of focal length 20 cm is kept coaxially at a distance D behind the convex lens such that rays coming out of concave lens are parallel again. Here the D is equal to (1) 20 cm (2) 30 cm (3) 40 cm (4) 80 cm 38. In a demonstration of dispersion without deviation phenomenon of thin prism combination, a prism X is chosen with refracting angle 5º and refractive index 1.40. It is combined with another prism Y of material refractive index 1.50. The refracting angle of prism Y is (1) 3º (2) 4º (3) 6.25º (4) 6º 39. Polarization of wave is a manifestation of its transverse nature. In an experiment light wave is polarized by reflection as per Brewster’s law. The angle between reflected and refracted light is (1) 0º (2) 30º (3) 45º (4) 90º 40. Originally the Young’s double slit experiment was performed in white light in which higher order spectra in the fringe pattern overlap each other. Assume that wavelength of blue light is 520 nm and that of red light is 780 nm. The value of x for which x th bright red band coincides with (x + 1)th blue band is (1) 5 (2) 4 (3) 3 (4) 2 41. An atom of mass M gets deexcited and the wavelength of photon emitted is ?. Linear momentum of the recoiling atom is (1) 2 ( / ) 2 h M ? (2) hc ? (3) h ? (4) 2 () 2 h M ? 42. Assuming Bohr’s model of hydrogen atom, the wavelength of ?-line of Balmer series is ?. The wavelength of ?-line of Lyman series is (1) 6 33 ? (2) 5 32 ? (3) 7 13 ? (4) 5 36 ? 43. Radioactive decay is an exponential decay process. Assume that the half life of a radioactive decay is 2 years. The time interval between 20% decay to 80% decay of such nuclei will be (1) 2 years (2) 4 years (3) 6 years (4) 8 years 44. Which of the following current-voltage (I - V) graph is characteristics of solar cell? (1) I V (2) I V (3) I V (4) I V 45. The truth table for the circuit shown will be x y (1) x 0 0 1 1 z 0 0 0 1 (2) x 0 0 1 1 z 0 1 1 1 (3) x 0 0 1 1 z 0 1 1 0 (4) x 0 0 1 1 z 1 0 0 1Read More

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