Question # 1

An intertial frame of reference is a frame of reference which is

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at rest

moving with uniform velocity

either at rest or moving with uniform velocity

none of these

Essential characteristic of equilibrium is

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Momentum equal to zero

Acceleration equal to zero

Kinetic energy equal to zero

Velocity equal to zero

Which of the following substances has got positive temperature coefficient of resistance?

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Carbon

Germanium

Silicon

Aluminium

None of these

The horizontal component of a projectile moving with initial velocity of 500 ms^-1at an angle 60° to x-axis is

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500 ms^-1

1000 ms^-1

250 ms^-1

Zero

The magnetic field outside the solenoid due to current is

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strong

zero

weak

uniform

The Phenomenon of generation of induced emf is called

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Electrostatic induction

Magnetic induction

Electromagnetic induction

Electric induction

Both A and B

The waveform of alternating voltage is a:

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Square

Rectangular

Saw-tooth

Sinusoidal

None of these

Battery is charged in motor cars, which is based on

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Chemical effect

Magnetic effect

Electric effect

None

To see the minor details of the object by microscope, it should have:

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High magnifying power

High resolving power

Am objective of larger focal length

None of these

The arrangement or molecules or atoms in a crystalline solid can be studied by using:

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Chemical methods

Neutrons

X-ray techniques

Copper atoms

Both (A) and (B)

The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is

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100 J

1.6 x 10^-17J

100 eV

1.6 x 10^-17eV

Geodesics, we mean to say that it is

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Circular path

Shortest straight line

Short distance two points on a spherical surface

All of these

The size of the domains in such that they can contain

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10²to 10⁴atoms

10⁴to 10⁸atoms

10⁸to 10¹²atoms

10¹²to 10¹⁶atoms

The 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

A ______ lens is used in the apparatus to get Newton,s rings

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Plano-concave

Plano-convex

Convexo-concave

Double convex

In n-type substances the minority carriers are

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Holes

Electrons

Neutrons

None

The SI unit of stress is same as that of.

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Momentum

Pressure

Force

Length

The centre of gravity of an object is

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The force of gravity on the object

The point about which the object rotates

The point at which the total weight of the object act

none of these

The total change in momentum of the isolated two ball system is

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Maximum

Minimum

Zero

None of these

The motion of molecules in gases i:

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Orderly

Random

Circular

All of these

On a diffraction grating a large number of close parallel equidistant slits are ruled on it

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By hand

electronically

mechanically

none of them

Dolphins have bodies to assist their movement in water are

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Irregular bodies

Closer to streamline body

Stream lined bodies

None of these

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