Question # 1

The rain drop falling from the sky reach the ground with

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Constant terminal velocity

Constant gravitational acceleration

Variable acceleration

acceleration greater than g

Amorphous solids:

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Have definite melting points

Are called glassy solids

Have no definite melting point

Both (B) and (C)

Both (A) and (C)

The ideal gas law is

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P = nRT

V = nRT

PV =RT

PV =nRT

The molecules or ions in a crystalline solids are

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static

not static

randomly moving

all of them

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

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super

Quantitative

Qualitative

Both B and C

Alfa particles are

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hydrogen nuclei

helium nuclei

electrons

photons

Balmer series was identified in:

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1685

1785

1885

1985

1585

When a constant potential difference is applied across the conductor, the drift velocity of electrons:

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Increases

Decreases

Remains the constant

Either of these

None of these

At ordinary temperature, an increase in temperature increases the conductivity of

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Conductor

Semiconductor

Insulator

Alloy

The highest value reached by the voltage or current:

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In quarter cycle is called Instantaneous value

In half cycle is called peak-to-peak value

In one cycle is called peak value

In half cycle is called Instantaneous value

None of these

Find the total displacement of a body in 8 seconds starting from rest with an acceleration of 20 cm/s²

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0.064 m

640 cm

64 cm

64 m

The young's modulus of a wire of length L and radius 'r' is Y. If the length is reduced to L/2 and radius to r/2, its Young's modulus will be

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Y/2

Y

2Y

4Y

The two thin tubes which show most correctly the behavior of water are

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1 and 2

2 and 3

3 and 4

4 and 5

An un-power and un-guided missile is called a

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rocket

ballistic missile

guided missile

none of them

A person is standing on a rotating stool spreading his arms.He suddenly contracts his arms.His

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Angular momentum increases

Momentum of inertia increases

Momentum of inertia decreases

Angular momentum decreases

A ray of light reflected from a dense medium under goes a phase change of:

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30°

60°

90°

180°

Which one of the following can act approximately as a source of monochromatic light

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Neon lamp

Fluorescent tube

Sodium lamp

none of these

Co-planar forces are those forces which are

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right angle to each other

parallel to each other

antiparallel to each other

acting in a plane

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

not completely filled and play active part in conduction process

not completely filled and play no part in conduction process

Examples of polymeric substances are:

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Plastic

Synthetic rubbers

Zirconia

All of these

Both A and B

By dimensional analysis, we can find

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Correctness of formula

Derivation of formula

Physical nature

All of these

Torque is zero if

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Moment arm is zero

Body is at rest

Uniform angular acceleration

None of these

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