Question # 1

The Unit of thermodynamic temperature is.

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C^o

F^o

K

None of these

Newton's rings are formed due to phenomenon of.

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Interference

Dispersion

Diffraction

Polarization

The first person who attempted to measure the speed of light was.

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Michelson

Hygen's

Galileo

Ability

A force of 100 N makes on angle of 60^owith y axis, its horizontal component is.

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50 N

60 N

70.7 N

86.6 N

The number of significant figures with the increases degree of approximation

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Decreases

Increases

Remains unchanged

None of these

The dimensions of work are.

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[MLT-1]

[MLT-2]

[ML2T-2]

[MLT]

The types of optical fibres are

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Three

Four

Five

Six

Intensity of light depend on

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Wave length

Amplitude

Velocity

Frequency

If heat is added to a system, then its entropy will.

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Increases and positive

Decrease and positive

Increases but negative

Decreases but negative

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

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Zero

Equal to gravity

Maximum

Constant

For working of heat engine, there must be

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A source

A sink

Ether of these

Both of them

Second pendulum has a time period

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1 sec

3 sec

2 sec

4 sec

Which one of the following force cannot do any work on the particle on which it acts.

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Fractional force

Gravitational force

Electrostatic force

Centripetal force

When body acquires terminal velocity them its acceleration 'a' becomes.

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a = 0

a = g

a > 0

a < 0

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

Kilo watt hour is the unit of

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Power

Energy

Force

Torque

The magnitude of A will be

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Zero

A²

1

A

The trajectory of a projectile is.

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Circle

Parabola

Hyperbola

Straight line

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