Question # 1

An ideal reversible heat engine has

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100% efficiency

Highest efficiency

80%

90%

Stoke's law holds for bodies having.

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Spherical shape

Oblong shape

Rectangular shape

All shapes

The SI unit of angular momentum is

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J.S-2

J.S-1

J.S

J.m

The units of magnifying power of microscope or telescope are.

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Metre

m^-1

dioptre

No unit

Law of physics expressed in term of

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Base quantites

Derived quantities

a and b

None of these

The focal length of convex lens

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Negative

Positive

small

Large

Temperature of a gas is increased from 27 oC to 127 oC. The ratio of its mean K.E. will be

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3/4

9/16

4/3

10/9

When a body is moving along a circular path, then such a motion is called

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Vibratory motion

Rotatory motion

Linear motion

None of these

Newton's rings are formed due to phenomenon of.

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Interference

Dispersion

Diffraction

Polarization

The actual efficiency of property turned petrol engine is.

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20% to 30%

30% to 35%

40% to 45%

25% to 30%

No spark plug is needed in the

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Petrol engine

Diesel engine

Gas engine

Water engine

The dimensions of work are

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MLT^-1

MLT^-2

ML²T^-2

ML^-1T^-1

Which one is a conservative force

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Elastic spring force

Air resistance

Frictional force

Tension in the spring

One complete round trip of a body is called

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Displacement

Time period

Vibration

Frequency

The state of human blood flow can be found by using.

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Newton's formula of speed of sound

Interference of sound

Phenomena of beats

Doppler's effect of sound

The distinguish between transverse and longitudinal wave_______ is used.

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Refraction

Interference

Diffraction

polarization

System Intenational was established in

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1967

1960

1971

1940

The minimum number of correctly positioned communication satellites to cover whole populated earth is.

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2

3

100

200

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