Question # 1

The magnetic moment of a circular coil carrying current is

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Directly proportional to the length of the wire in the coil

Inversely proportional to the length of the wire in the coil

Directly proportional to the square of the length of the wire in the coil

Inversely proportional to the square of the length of the wire in the coil

Two electric bulbs of 200 W and 100 W have same voltage.If R1 and R2 be their resistance respectively then

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R₁ = 2R₂

R₂ = 2R₁

R₂ = 4R₁

R₁ = 4R₂

A person standing on a rotating platform has his hands lowered He suddenly outstretches his arms.The angular momentum

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Becomes zero

Increases

Decreases

Remains the same

Absolute temperature can be calculated by

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Mean square velocity

Motion of the molecule

Both (A) and (B)

None of these

Two sources of sound are said to be coherent if

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They produce sounds of equal intensity

They produce sounds of equal frequency

They produce sound waves vibrating with the same phase

They produce sound waves with zero or constant phase difference all instant of time

A bullet is short from a rifle. As a result the rifle recoils, The kinetic energy of rifle as compared to that of bullet is

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Less

Greater

Equal

Cannot be concluded

A body is dropped from a tower with zero velocity reaches ground in 4s. The height of the tower is about

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80 m

20 m

160 m

40 m

How much water a pump of 2kW can raise in one minute to a height of 10 m. take g = 10 m/s²?

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1000 liters

1200 liters

100 liters

2000 liters

The initial velocity of a body moving along a straight line in 7 m/s. It has a uniform acceleration of 4 m/s². The distance covered by the body in the 5th second of its motion is

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25 m

35 m

50 m

85 m

At a certain instant a stationary transverse wave is found to have maximum kinetic energy the appearance of string of that instant is:

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Sinusoidal shape with amplitude A/3

Sinusoidal shape with amplitude A/2

Sinusoidal shape with amplitude A

Straight line

Boyle's law is applicable in

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Isochoric process

Isothermal process

Isobaric process

Isotonic process

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