JIPMER Physics Mock Test - 7


60 Questions MCQ Test JIPMER 2020: Subject wise and Full Length Mock Tests | JIPMER Physics Mock Test - 7


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This mock test of JIPMER Physics Mock Test - 7 for NEET helps you for every NEET entrance exam. This contains 60 Multiple Choice Questions for NEET JIPMER Physics Mock Test - 7 (mcq) to study with solutions a complete question bank. The solved questions answers in this JIPMER Physics Mock Test - 7 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this JIPMER Physics Mock Test - 7 exercise for a better result in the exam. You can find other JIPMER Physics Mock Test - 7 extra questions, long questions & short questions for NEET on EduRev as well by searching above.
QUESTION: 1

An ac source is rated at 220V, 50Hz. The time taken for voltage to change from its peak value to zero is

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QUESTION: 2

Two ions having masses in the ratio 1 : 1 and charges 1 : 2 are projected into uniform magnetic field perpendicular to the field with speeds in the ratio 2 : 3. The ratio of the radii of circular paths along which the two particles move is

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QUESTION: 3

The angular velocity of the minutes hand of a watch is—

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QUESTION: 4

Putting a dielectric substance between two plates of a condenser, the capacity, potential and potential energy respectively

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QUESTION: 5

A conductor rod of length L rotates with angular speed ω in a uniform magnetic field of induction B which is perpendicular to its motion. The induced e.m.f developed between the two ends of the rod is

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QUESTION: 6

For a coil having L=2 mH, current flows at the rate of 10-3 ampere/sec. The emf induced is

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QUESTION: 7

A wire of resistance 1 Ω is stretched to double its length. The resistance will become

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QUESTION: 8

For a cell terminal potential difference is 2.2 V When circuit is open and reduces to 1.8 V when cell is connected to a resistance of R=5 Ω. Determine the internal resistance of the cell (r)

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QUESTION: 9

Two point charges of +4 μC and -6 μC are separated by a distance of 20 cm in air. At what point, on the line joining the two charges from charge +4 μC, the electric potential will be zero?

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QUESTION: 10

The ozone layer absorbs

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QUESTION: 11

A parallel plate capacitor is made by stacking n equally spaced plates connected alternatively. If capacitance between any two adjacent plates is C, then the resultant capacitance is

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QUESTION: 12

Average density of the earth

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QUESTION: 13

If the angular speed of the earth is doubled, the value of acceleration due to gravity at the north pole

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QUESTION: 14

Which of the following is the best example of an ideal black body?

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QUESTION: 15

The horizontal acceleration that should be given to a smooth inclined plane of angle sin-1 (1/l)  to keep an object stationary on the plane, relative to the inclined plane is

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QUESTION: 16

In Young's double slit expt., distance between sources is 1 mm and distance between the screen and sources is 1 m. If the fringe width on the screen is 0.06 cm, then λ is

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QUESTION: 17

A particle of mass m and charge q moves with a constant velocity ν along the positive x-direction. It enters a region containing a uniform magnetic field B directed along the negative z-direction, extending from x = ato x = b. The minimum value of ν required so that the particle can just enter the region x>b is

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QUESTION: 18

A beam of electrons passes undeflected through mutually perpendicular electric and magnetic fields. If the electric field is switched off, and the same magnetic field is maintained, the electrons move

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QUESTION: 19

A particle moving in a magnetic field has increase in its velocity, then its radius of the circle

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QUESTION: 20

A diamagnetic material in a magnetic field moves

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QUESTION: 21

Work done in turning a magnet of magnetic moment M by an angle of 90o from the magnetic meridian is n times the corresponding work done to turn through an angle of 60o, where n is

Solution:

W1 = MB (cos 0o - cos 90o) = MB (1 - 0) = MB
W2 = MB (cos 0o - cos 60o) = MB (1 - 1 2 ) = MB/2
∴ W1 = 2W2
⇒ n = 2

QUESTION: 22

Kinetic theory of gases was put forward by

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QUESTION: 23

To shield an instrument from external magnetic field, it is placed inside a cabin made of

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QUESTION: 24

The application of Bernoulli theorem can be seen in

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The upper surface of aeroplane wing is more curved than its lower surface, therefore, the speed of air above the wings two is larger than the speed of the air below the wings.
According to Bernoulli’s theorem, the pressure above the wings becomes less than that the pressure below the wings. Due to this difference of pressure on the two sides of the wings, a vertical lift acts on the aeroplane.
When this lift is sufficient to overcome the gravity pull on the aeroplane, the aeroplane is lifted up.

QUESTION: 25

Oil spreads over the surface of water, whereas water does not spread over the surface of oil, because

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QUESTION: 26

The extension in a string, obeying the Hooke's law, is x. The speed of sound in the stretched string is v. If the string is extended to 1.5 x, then speed of sound will be

Solution:

Speed of sound in a stretched string v = √T/μ .....(i)
Where T is the tension in the string and μ is mass per unit length
According to Hooke's law, F ∝ x
∴ T ∝ x .....(ii)
From (i) and (ii) v ∝ √ x
∴ v' = √1.5 v = 1.22 v

QUESTION: 27

A ball falls from a height of 200 m. then the distance travelled by it during the first 3 consecutive seconds in the ratio of

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QUESTION: 28

A flywheel rotating about a fixed axis has a kinetic energy of 360 joule when its angular speed is 30 rad/sec. The moment of inertia of the wheel about the axis of rotation is

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QUESTION: 29

In the above problem, if the lift moves up with a constant velocity of 2 m/sec, the reading on the balance will be

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QUESTION: 30

In a fission of U235 nucleus on average ----- neutrons are released.

Solution:

When U235 is bombarded by a neutron, it splits into barium,
Krypton and 2 or 3, so average 2.5 neutrons per fission

QUESTION: 31

When two deuterium nuclei fuse together, in addition to tritium, we get a

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QUESTION: 32

A terrestrial telescope is made by introducing an erecting lens of focal length f between the objective and eyepiece lenses of an astronomical telescope. This causes the length of the telescope tube to increase by an amount equal to

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QUESTION: 33

A particle execute simple harmonic motion with a frequency f. The frequency with which its kinetic energy oscillates is

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QUESTION: 34

Kinetic energy of emitted electron depends upon

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QUESTION: 35

In photoelectric effect experiment, the stopping potential for incident light of wave-length 4000 Å is 2 volt. If the wavelength is changed to 3000 Å, the stopping potential is

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QUESTION: 36

A particle A is dropped from a height and another particle B is projected in horizontal direction with speed 5 m/s fom the same height, then correct statement is

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QUESTION: 37

For the normal setting of a telescope

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QUESTION: 38

A disc is placed on a surface of pond which has refractive index 5/3. A source of light is placed 4 m below the surface of liquid. The minimum radius of disc needed so that light is not coming out is

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QUESTION: 39

A convex lens has a focal length f. It is cut into two parts along a line perpendicular to principal axis. The focal length of each part will be

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QUESTION: 40

In a pond of water, a flame is held 2 m above the surface of water. A fish is at depth of 4 m from water surface. Refractive index of water is 4/3. The apparent height of the flame from the eyes of fish is

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QUESTION: 41

A wheel of mass 1000 kg has a moment of inertia of 160 kg-m2 about its own axis. The radius of gyration is

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QUESTION: 42

The time period of a particle in simple harmonic motion is 8 seconds. At t = 0 it is at the mean position. The ratio of the distance travelled by it in the first and second seconds is

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QUESTION: 43

Two springs of force constants 1000 Nm-1 and 2000 Nm-1 are stretched by same force. The ratio of their respective potential energies is

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QUESTION: 44

A pure semi-conductor has

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QUESTION: 45

A semiconductor device is connected in a series circuit with a battery and a resistance. A current is found to pass through the circuit. If the polarity of the battery is reversed, the current drops almost to zero. The device may be

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QUESTION: 46

When both the listener and source are moving towards each other, then which of the following is true regarding frequency and wavelength of wave observed by the observer?

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QUESTION: 47

Surface tension arises due to

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QUESTION: 48

The electrochemical equivalent of a material in an electrolyte depends on

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QUESTION: 49

A 500 watt heating unit is designed to operate from a 115 volt line. If the line voltage dropes to 110 volt, the percentage drop in heat output will be

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QUESTION: 50

A long cylindrical vessel of volume 'v' and linear coefficient of expansion 'a' contains a liquid. The level of liquid has not changed on heating. The volume coefficient of real expansion of liquid is

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QUESTION: 51

A container of volume 1 m3 is divided into two equal compartments by a partition. One of these compartments contains an ideal gas at 300 K. The other compartment is vacuum. The whole system is thermally isolated from its surroundings. The partition is removed and the gas expands to occupy the whole volume of the container. Its temperature now would be

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QUESTION: 52

A thermoelectric refrigerator works on

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QUESTION: 53

A metallic ball and highly stretched spring are made of the same material and have the same mass. They are heated so that they melt, the latent heat required

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QUESTION: 54

Unit of impulse is

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QUESTION: 55

Dimensions of impulse are

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QUESTION: 56

Huygen's wave theory allows us to know

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QUESTION: 57

To a stationary man the frequency of a sound source moving towards the man appears to be

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QUESTION: 58

A train is approaching a platform with a velocity ν. The frequency heard by an observer standing at the station is

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QUESTION: 59

Two bodies with kinetic energies in the ratio 4:1 are moving with equal linear momentum. The ratio of their masses is

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QUESTION: 60

The Doppler's effect is applicable for

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