Question # 1

The product of force and time is called

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acceleration

linear momentum

angular momentum

impulse

A particle is moving along a circular path with uniform speed. Its projection will execute____along the____of the circle:

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Circular motion, circumference

Vibrator, chord

SHM, diameter

SHM, circumference

When a nucleus emits an alpha particle, it atomic mass decreased by

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2

1

4

3

When certain nucleus emits anα particle, its mass number:

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Increases by one

Decreases by one

Remain same

Decreases by four

None of these

The SI units of momentum is

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kg m s^-2

kg ms

kg m s²

N-s

At the temperature, a body emits radiation which is principally

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of long wavelengths in the visible region

of long wavelengths in the invisible infrared region

of short wavelength in invisible ultraviolet region

none of these

Which of the following type of force can do no work on the particle on which it acts:

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Frictional force

Gravitational force

Electric force

Centripetal force

The magnetism produced by electrons within an atom can arise from

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electrons orbiting the nucleus

electrons posses a spin

both motions

none of these motions

In magnet-coil experiment, emf can be produced by:

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Keeping the coil stationary and moving the magnet

Keeping the magnet stationary and moving the coil

Relative motion of the loop and magnet

Any one of above

All above

To and fro motion of a body is about its mean position is known as:

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Translatory motion

Vibratory motion

Rotatory motion

None of these

The vibrations of factory floor caused by the running of heavy machinery is an example of

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free vibration

natural vibrations

forced vibrations

all of them

The weight of the body at the centre of the earth is.

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Infinite

Zero

Slightly less than that at the equator

Slightly more than that at the equator

The term impulse means, the force applied on a body for

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Permanently

Temporary

Very short interval of time

None of these

A force of 50 dynes is acted on a body of mass 5 g which is at rest.for and interval of 3 seconds,then impulse is

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0.15 x 10^-3 Ns

0.98 x 10^-3 Ns

1.5 x 10^-3 Ns

2.5 x 10^-3 Ns

Crystalline solids are in the form of:

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Metals

Ionic compounds

Ceramics

Both A and B

All of these

Turn table is the plateform over which we place

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Diffraction grating

Prism

Glass slab

a and b

Whenever a body moves from one position to another, the change in its position is called

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Motion

Displacement

Distance

None of these

2π radian is equal to the degrees

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180^o

90^o

360^o

None of these

In petrol engine, the second stroke is the

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Compression

In take

Power

None of these

What is the main cause of the shinning of diamond?

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Reflection

Refraction

Total internal reflection

Dispersion of light

In case of linear deformation, the ratio of the tensile stress to the tensile strain is called

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Young's modulus

Bulk modulus

shear modulus

all of them

When the deformation produced in the material becomes permanent, this type of behaviour is called

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proportionality

elasticity

plasticity

none of them

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