Question # 1

Astrophysics is a branch of physics, which deals with:

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Sub-atomic particles

Stars and galaxies

Light and sound

Music

With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are

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Energy, momentum and mass

Energy

Energy and mass

Energy and linear momentum

During each cycle, alternating voltage reaches a peak value

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One time

Two times

Four times

A number of times depending on the frequency

A carnot cycle consists of

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One step

two step

three steps

four steps

The CRO deflects the beam of electrons, when they passes through uniform

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electric field

gravitational field

magnetic flax

magnetic field

The blood pressure of a person

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decrease with age

increase with age

has no effect with age

none of them

Flux through a closed surface of any shape and flux through the surface of a sphere drawn around a charge are:

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Different

Same

Such that it is greater in the first case

Such that it is greater in the second case

None of these

When transistors are used in digital circuits they usually operate in the

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Active region

Breakdown region

Saturation and cutoff regions

Linear region

Amperean path is a:

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Closed path

Rectangular path

Circular path

Any of above

Broken path

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

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Negative

Positive

Infinite

Zero

Electric flux is:

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Cross product of two vector

Dot product of two vectors

A vector quantity

A scalar quantity

Both (B) and (D)

Truth of kinetic energy theory is confirmed by:

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Diffusion of gases

Brownian motion

Both A and B

None of these

Age of the Earth is

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14 × 10¹⁷ sec

1.4 × 10¹⁹ sec

1.4 × 10¹⁷ sec

1.4 × 10¹⁵ sec

Tick the one which is not a crystalline solid:

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Zirconia

Glass

Copper

Ceramic solid

An ionic compound

Sun has elliptical shape when it rises and sets due to

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Refraction

Reflection

Scattering

Dispersion

If L and R represent inductance and resistance respectively,then dimensional formula of L/R will be

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ML°T°

M°L°T

M°L°T^-2

M°LT^-2

Two forces of 4 dyne and 3 dyne act upon a body.The resultant force on the body can only be

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Between 3 and 4 dyne

Between 1 and 7 dyne

More than 3 dyne

More than 4 dyne

A particle is moving with a constant speed along a straight line path A force is not required to

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Increase its speed

Decrease its momentum

Change its direction

Keep it moving with the same speed

Can two lights of car can produce interference

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Yes

No

Partly produce interference

None of these

At higher temperature their vibrations become so great that structure suddenly breaks up and changes into

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Order to disorder

Solid into liquid

Melted

All of them

The time rate of change of displacement is called

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Speed

Velocity

Acceleration

None of these

Temperature of a system is defined as

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Initial K.E. of its molecules

Instantaneous K.E. of its molecules

Average K.E. of its molecules

All of these

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