Question # 1

At what temperature the adiabatic change is equivalent to the isothermal change?

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Zero degree Celsius

Zero Kelvin

Critical temperature

Above critical temperature

When a body moves against the force of friction on a horizontal plane, the work done by the body is:

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Positive

Negative

Zero

None of these

When a water droplet falling freely through air, the drag force on water droplet increases with th

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decrease in speed

increase in speed

pressure

none of them

The bands below the valence band are

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completely filled and play active part in conduction process

completely filled and plays no part in conduction process

completely filled and play active part in conduction process

not completely filled and play no part in conduction process

A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when:

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The coil is distorted

The coil is rotated

The coil is neither distorted nor rotated

Both A and B

None of these

The decrease in velocity per unit time is called

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deceleration

acceleration

uniform acceleration

variable acceleration

One joule is equal to

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1.6 x 10¹⁹eV

6.25 x 10¹⁸eV

1.6 x 18¹⁸eV

6.25 x 10¹⁹eV

When two waves with same frequency and constant phase difference phase difference interfere

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There is a gain of energy

There is a loss of energy

The energy is redistributed and the distribution changes with time

The energy is redistributed and the distribution remains constant with time

In velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is

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8

4

6

7

Which of the following is an example of SHM(in ideal situations)

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Motion of simple pendulum

Motion of horizontal spring man system

Motion of violin string

All of these

A dimension stands for the ___________ nature of certain physical quantity.

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super

Quantitative

Qualitative

Both B and C

The smallest part of a crystal lattice is called:

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A molecule

An atom

A unit cell

A particle

Maximum value of solid angle for closed surface is

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2π rad

2π sr

4π sr

360°

Five equal forces of 10N each are applied at one point and all are lying in one plane.If the angles between them are equal,the resultant force will be:

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Zero

10 N

20 N

10 √2 N

When a crystal is subjected to stress, it tends to break or fracture along definite direction which is characteristic of a simple. This is called

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Cleavage

Allotropy

Isotropy

None of these

The time rate of change of velocity is called

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Initial velocity

Uniform velocity

Accelerations

None of these

Wavelength of light, on the average, is given by:

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10^-14m

10^-10m

10^-6m

10^-4m

On moving a charge of 20 coulombs by 2 cm,2J of work is done,then the potential difference between the points is

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0.1 V

8 V

3 V

0.5 V

Moment of inertia does not depend upon

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Angular velocity

Mass

Position of axis of rotation

None of these

The magnitude of vector A,B and C are respectively 12,5 and 13 units and A + B = C then the angle between A and B is

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0

π

π/2

π/4

In order to observe interference , the interfering beams must be

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monochromatic

coherent

either of them

both of them

A ray of light always points

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Anti parallel to wave front

Perpendicular to wave front

Parallel to wave lets

None

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