Question # 1

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%

Newton's rings are formed due to phenomenon of.

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Interference

Dispersion

Diffraction

Polarization

The collision between the gas molecules is

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Elastic

Inelastic

Both a and b

None of these

The centripetal force is always directed

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Away from the centre along the radius

Along the direction of motion

Opposite to the motion of the body

Towards the centre along the radius

The dimension of pgh has same as that of

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Work

Energy

Pressure

Mass

When one mirror of a Michelson interferometer is moved a distance of 0.5 mm, 2000 fringes and observed, The wavelength of light used is.

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5000 m

50000 A^o

500 cm

2000 A^o

If a stretched string 4 m long and it has 4 loops of stationary waves, then the wave length is.

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1m

2 m

3 m

4 m

the acceleration along x -axis direction in case of projectile is.

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Zero

Equal to gravity

Maximum

Constant

The number of spark plug needed in diesel engine is

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0

2

3

4

Substances that don't flow easily has

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Large co-efficient of viscosity

Small co-efficient of viscosity

Medium co-efficient of viscosity

Zero-coefficient of viscosity

Weight of a 60 kg man in moving elevator with constant acceleration of 1/2 f

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Zero

300 N

600 N

200 N

The wavelength of wave produced by microwave oven is.

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12 cm

12 m

18 m

18 cm

The force and torque are analogous to

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Velocity

Mass and weight

Moment of Inertia

Each other

The error in speed of sound calculated by Newton at STP is about.

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0 %

14 %

15 %

16 %

Efficiency of steam locomotive is.

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8%

10%

9%

7%

1 torr in Nm-2 is expressed as.

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130.5 Nm-2

133.3 N m-2

140.2 Nm-2

135.2 Nm-2

The minimum distance from eye at which an object appears to be distinct is

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Near point

Focal length

Image distance from lens

Object distance from lens

Which of following is irreversible process

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Slow compression of an elastic spring

Slow evaporation of substances in isolated vessel

Slow expansion of a gas

A chemical explosion

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