Question # 1

The quantity have dimension of ML²T⁰²will have SI unit of:

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Watt

Newton

Joule

Metre

According to the special theory of relativity, a moving clock

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runs faster

runs slower

neither runs faster nor slower

all of these

The unit of spring constant is:

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J-sec

Metre

Nm^-1

None of these

Electrostatics is the branch of physics which deals with the study of electro charges:

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At rest

At rest under the action of electric forces

In motion under the action of electric forces

In motion

At rest under the action of nuclear forces

Electrons of an isolated atom are bound to the nucleus, and

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can only have distinct energy level

can only have same energy level

may or may not have distinct energy levels

none of these

F = I(L x B) is a

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vector

scalar

unit vector

none of these

If a given spring of spring constant k is cut into two indentical segments, the spring constant of each segment is:

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k/2

2 k

4 k

None of these

The wave motion set up in any medium depends upon:

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Elasticity

Inertia

Density

All of these

The work done on the system by the environment is considered as

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positive

negative

zero

any one of them

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

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R/2

P

2P

Depending on the relative mass of the gases

The effects of bends in a wire on its electrical resistance are:

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Zero

Much larger

Larger

Smaller

None of these

Radian is the unit of

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Solid Angle

Plane Angle

both a and b

None of these

Which of the following phenomenon is not application of Bernoulli s equation

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Swing in cricket ball

Flying of airplane

Working of carbonator

Beats

The reverse process of photo-electric effect is called:

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Pair production

Compton effect

Annihilation of matter

X-rays

When a stress changes the shape, it is called the

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compressional stress

tensile stress

shear stress

any one of them

For a diatomic gas C_v=5/2R. The constant gamma for gas is

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5/7

4/35

7/5

35/4

Newton's laws are adequate for speeds that are

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low compared with the speed of light

equal to the speed of light

greater than the speed of light

all of them

The original source of fossil fuels is

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Geothermal

Biomass

Sun

None of these

Newtons first law of motion says a body will

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Remains at rest

Continuous move to with uniform velocity

Have no unbalanced external force act

All of these

Phase change of 180° is equivalent to a path difference of

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2λ

λ

λ/2

λ/4

Two masses of 1 g and 4 g are moving with equal kinetic energies.The ratio of the magnitudes of their linear momenta is:

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4 : 1

√2 : 1

1 : 2

1 : 16

Plane polarized light can be produced by:

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Simple reflection

Refraction

Selective absorption

All of these

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