Question # 1

The efficiency of diesel engine is about

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25% to 30%

35% to 40%

40% to 50%

50% to 60%

An ideal heat engine can only be 100% efficient if its cold temperature reservoir is at.

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0 K

0 ^oC

100 K

100 ^oC

The study of Physics deals with

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Laws of motion

The structure of space and time

Force present in the nature

All of the above

Speed of sound in aluminum at 20 ^oC is.

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3600 m/s

5100 m/s

5130 m/s

3500 m/s

Direction of a vector in space requires

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Two axis

Three axis

Four axis

Both a and b

The least distance of distinct vision for the normal eye is.

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15 cm

25 cm

125 cm

25 m

A force of 100 N makes an angle of 60o with Y- Axis, its horizontal component is.

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50 N

60 N

70.7 N

86.6 N

Watt -m2 is the unit of

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Energy

Intensity

Power

Work

Slope of velocity time graph describes a physical quantity called.

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Displacement

Average velocity

Average acceleration

Momentum

the distance covered during one vibration of an oscillating body in terms of amplitude 'A' is

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A/2

A

2A

4A

the length of simple pendulum of time period 1 second is

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2 m

1 m

0.5

0.25 m

The fundamental quanties which form basic for M.K.S system are

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Mass , Length , and time

Mass, acceleration and time

Mass, work and time

Velocity, force and time

Total change in momentum of an isolated system is

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Always (+) ve

Always (-) ve

Has maximum value

Zero

10 waves pass through a point in 2 seconds with speed 10 ms-1 the frequency of wave will be

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1 Hz

2 Hz

5 Hz

10 Hz

The amplitude of a vibrating body at resonance in vacuum is

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Minimum

Maximum

Zero

Infinite

The motion of a simple pendulum is the example of

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Vibratory motion

Rotatory motion

Periodic motion

Both a and c

Venturimeter is used ot measure.

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Speed of fluid

Pressure of fluid

Volume of fluid

Mass of fluid

Which of the following is mechanical wave

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Heat

Light

Sound

None of these

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