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NEET Exam  >  NEET Tests  >  Test: Physics Mock Test - 2 - NEET MCQ

Test: Physics Mock Test - 2 - NEET MCQ


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30 Questions MCQ Test - Test: Physics Mock Test - 2

Test: Physics Mock Test - 2 for NEET 2024 is part of NEET preparation. The Test: Physics Mock Test - 2 questions and answers have been prepared according to the NEET exam syllabus.The Test: Physics Mock Test - 2 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Physics Mock Test - 2 below.
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Test: Physics Mock Test - 2 - Question 1
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When the plane of the armature of an A.C. generator is parallel to the field in which it is rotating, then

Test: Physics Mock Test - 2 - Question 2
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Solar energy is mainly caused due to

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Test: Physics Mock Test - 2 - Question 3
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A 5∘C rise in temperature is observed in a conductor by passing a current. When the current is doubled the rise in temperature will be approximately:                                                                                       

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Test: Physics Mock Test - 2 - Question 4
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Four particles, each of mass 1kg, are placed at the corners of a square of side one metre in the XY-plane. If the point of intersection of the diagonal of the square is taken as a origin, the coordinates of the centre of mass are:
Test: Physics Mock Test - 2 - Question 5
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A body 'A' experiences perfectly elastic collision with a stationary body 'B' . If after collision the bodies fly apart in the opposite directions with equal velocities, the mass ratio of 'A' and 'B' is
Test: Physics Mock Test - 2 - Question 6
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Three resistors each of 2 ohm are connected together in a triangular shape. The resistance between any two vertices will be
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Test: Physics Mock Test - 2 - Question 7
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The current flowing through a wire depends on time as I = 3t2 + 2t +5. The charge flowing through the cross-section of the wire in time from t = 0 to t = 2 sec. is
Detailed Solution for Test: Physics Mock Test - 2 - Question 7

Explanation:

Given:
- Current flowing through the wire: I = 3t2 + 2t + 5
- Time interval: t = 0 to t = 2 sec

Charge Flowing Through the Cross-Section of the Wire:
- The charge flowing through the wire is given by the integral of current with respect to time.
- Q = ∫(3t2 + 2t + 5) dt
- Q = [t3 + t2 + 5t] evaluated from t = 0 to t = 2 sec
- Q = [(2)3 + (2)2 + 5(2)] - [(0)3 + (0)2 + 5(0)]
- Q = [8 + 4 + 10] - [0 + 0 + 0]
- Q = 22 C

Therefore, the charge flowing through the cross-section of the wire from t = 0 to t = 2 sec is 22 Coulombs. Hence, the correct answer is A: 22C.

Test: Physics Mock Test - 2 - Question 8
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The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux φ linked with the primary coil is given by φ = φ 0 + 4t, where φ is in weber, t is time in second and φ 0 is a constant, the output voltage across the secondary coil is
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Test: Physics Mock Test - 2 - Question 9
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Angular displacement θ of a fly wheel varies with time as θ = at + bt2 + ct3, then angular acceleration is given by
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Test: Physics Mock Test - 2 - Question 10
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In an L-R circuit, time constant is that time in which current grows from zero to the value
Test: Physics Mock Test - 2 - Question 11
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Eight dipoles of charges of magnitude are placed inside a cube. The total electric flux coming out of the cube will be
Detailed Solution for Test: Physics Mock Test - 2 - Question 11

Explanation:


 


  • Electric Flux: The electric flux through a closed surface is given by the total electric field passing through that surface.

  • Gauss's Law: According to Gauss's Law, the total electric flux through a closed surface is equal to the total charge enclosed by that surface divided by the permittivity of free space (ε₀).

  • Given Situation: In this case, there are eight dipoles of charges inside a cube. Since dipoles consist of equal and opposite charges separated by a distance, the total charge enclosed by the cube is zero.

  • Total Electric Flux: Therefore, the total electric flux coming out of the cube is zero as there is no net charge enclosed.

  • Therefore, the correct answer is A: zero.


    •  
Test: Physics Mock Test - 2 - Question 12
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The capacity of a condenser 'A' is 10 μ F and it is charged by a battery of 100V. The battery is disconnected and the condenser is connected to a condenser 'B'. The common potential is 40V. The capacity of 'B' is
Test: Physics Mock Test - 2 - Question 13
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A heavy uniform chain lies on a horizontal table-top. If the coefficient of friction between the chain and table surface is 0.25, then the maximum fraction of length of the chain, that can hang one edge of the table is
Test: Physics Mock Test - 2 - Question 14
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Kepler discovered
Test: Physics Mock Test - 2 - Question 15
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If density of earth increased 4 times and its radius become half of what it is, our weight will
Test: Physics Mock Test - 2 - Question 16
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A partition wall has two layers A and B in contact, each made of different material. They have the same thickness but the thermal conductivity of layer A is twice that of layer B. If the steady state temperature difference across the wall is 60 K, then the corresponding difference across the layer A is
Test: Physics Mock Test - 2 - Question 17
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Under constant temperature, graph between P and 1/V is a
Test: Physics Mock Test - 2 - Question 18
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Two long parallel wires carry equal current I in the same direction. The length of each wire is l and the distance between them is a. Force acting on each wire is
Test: Physics Mock Test - 2 - Question 19
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A length of wire carries a steady current. It is bent first to form a circular coil of one turn. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field at the centre caused by the same current is
Test: Physics Mock Test - 2 - Question 20
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The magnetic compass is not useful for navigation near the magnetic poles. Since
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At the magnetic poles, a dip needle stands vertical (dip=90 degrees), the horizontal intensity is zero, and a compass does not show direction. At the north magnetic pole, the north end of the dip needle is down; at the southmagnetic pole, the north end is up. At the magnetic equator the dip or inclination is zero so option C
Test: Physics Mock Test - 2 - Question 21
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A spherical drop of water has 1 mm radius. If the surface tension of water is 70 x 10⁻3 N-m⁻1, then difference of pressures between inside and outside of spherical drop is
Test: Physics Mock Test - 2 - Question 22
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According to the Hooke's law, if stress is increased, then ratio of stress to strain
Test: Physics Mock Test - 2 - Question 23
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The moment of inertia of a body comes into play
Test: Physics Mock Test - 2 - Question 24
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A body freely falling from rest has a velocity ν after it falls through a height h. The distance it has to fall down furthur for its velocity to become double, is
Test: Physics Mock Test - 2 - Question 25
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A bomb is dropped from an aeroplane moving horizontally at constant speed. When air resistance is taken into consideration, the bomb will
Test: Physics Mock Test - 2 - Question 26
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Which of the following cannot be resultant of the vectors of magnitude 5 and 10?
Detailed Solution for Test: Physics Mock Test - 2 - Question 26

CONCEPT: 

The Resultant of two vectors is given by:

R2 = (A2 + B2 + 2AB cosθ) 

where R is the resultant vector, A and B are the two vectors, and θ is the angle between two vectors.​

Maximum value of R = A + B when θ = 0° 

Minimum value of R = A - B when θ = 180° 

CALCULATION:

Given that Two vectors are 5 units and 10 units

The maximum value of the resultant R = A + B = 10 + 5 = 15 units

The minimum value of the resultant R = A - B = 10 - 5 = 5 units

  • The resultant vector can be between 5 to 15 units.
  • So the result could not be 4 units.
  • Hence the correct answer is option 4.
Test: Physics Mock Test - 2 - Question 27
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A lift of mass 1000 kg is moving with an acceleration of 1 m/s2 in upward direction. Tension developed in the string, which is connected to the lift, is
Detailed Solution for Test: Physics Mock Test - 2 - Question 27


The mass of the lift is 1000 Kg , the acceleration of 1 m / s^2 and the acceleration due to gravity is 9.8 m / s^2 .

The tensions developed in strings is given as ,

T = mg + ma

===》 1000 × 9.8 + 1000 × 1

=====》 10800 N

Thus , the tensions developed in strings is 10800 N.

Test: Physics Mock Test - 2 - Question 28
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A pendulum bob has a speed of 3 m/s at its lowest position. The pendulum is 0.5 m long. The speed of the bob, when the length makes an angle of 60o to the verticle, will be (If g=10 m/s2)
Test: Physics Mock Test - 2 - Question 29
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A ball is thrown upwards and it returns to ground describing a parabolic path. Which of the following remains constant
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Explanation:


  • Kinetic energy of the ball:
    - The kinetic energy of the ball changes as it moves up and down in its parabolic path. As the ball rises, its kinetic energy decreases due to gravity acting against its motion, and as it falls back to the ground, its kinetic energy increases again. Therefore, the kinetic energy of the ball is not constant throughout its motion.

  • Speed of the ball:
    - The speed of the ball changes continuously as it moves up and down in its parabolic path. It is maximum at the moment of release and decreases to zero at the highest point of its path, then increases again as it falls back down. Therefore, the speed of the ball is not constant.

  • Horizontal component of velocity:
    - The horizontal component of velocity remains constant throughout the motion of the ball. This is because there are no horizontal forces acting on the ball once it is released. Therefore, the horizontal component of velocity remains the same until the ball hits the ground.

  • Vertical component of velocity:
    - The vertical component of velocity changes as the ball moves up and down. At the moment of release, the vertical component of velocity is at its maximum. As the ball moves upwards, the vertical component of velocity decreases due to the effect of gravity until it reaches zero at the highest point. Then, as the ball falls back down, the vertical component of velocity increases in the downward direction. Therefore, the vertical component of velocity is not constant.
Test: Physics Mock Test - 2 - Question 30
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The radius of gyration of a uniform rod of length L about on axis passing through its centre of mass is
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