Question # 1

If we draw a graph between d (along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis, then area under this straight line represents:

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Power

Work

Pressure

None of these

During the upward motion of the projectile, the vertical component of velocity:

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Decreases

Increases

Remains constant

None of these

The sum of positive and negative peak values are usually written as

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P-P value

negative

zero

may be positive or negative

The cause of mirage observed in deserts in bright sunlight is due to

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Refraction of light

Reflection of light

Scattering of light

Total internal reflection of light

Referring to above figure, current in coil P falls from its maximum value to zero:

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At the instant the switch is closed

At the instant the switch is opened

When switch is kept open

When switch is kept closed

None of these

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec^-2comes out to:

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980 N

580 N

1380 N

Zero

The internal energy of a system does not depend upon the

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initial state of the system

final state of the system

path

none of them

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 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

completely filled and play active part in conduction process

not completely filled and play no part in conduction process

The wave form of SHM is

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Pulsed wave

Square wave

Triangular waved

Sine wave

Melting point of ice

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Increases with increasing pressure

Decreases with increasing pressure

Is independent of pressure

Is proportional to pressure

Compton Effect makes the use of the law of conservation of:

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Energy

Momentum

Charge

Both (a) & (b)

Minimum number of unequal forces whose vector sum can be zero is

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3

4

2

5

Wavelength of a laser beam can be used as a standard of

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Time

Angle

Length

Temperature

If the instant velocity does not change, the body is moving with a

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Initial velocity

Variable velocity

Uniform velocity

None of these

Torque is a

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Scalar quantity

Vector quantity

Physical quantity

None of these

Television signal are converted into light signals by

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Decoder

Transistor

Photodiode

Optical fibre

Can two lights of car can produce interference

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Yes

No

Partly produce interference

None of these

High temperature water with pressure, come to the surface as

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Hot springs

Geysers

Steam vents

All of these

The value of the orbital radius measured for the centre of the Earth

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4.29 × 10⁵ km

4.23 × 10⁶ km

4.23 × 10⁴ km

4.23 × 10⁶ km

1 revolution is equal to

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2π radian

360^o

Both

None of these

The metals become electrically conducting due to their

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Ductility

Hardness

Structure

All of them

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