Question # 1

The number of significant figures with the increases degree of approximation

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Decreases

Increases

Remains unchanged

None of these

Turning of radio is example of.

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Mechanical resonance

Electrical resonance

Physical resonance

Biological resonance

The power needed to lift a mass of 5000 g to height of 1 m in 2 secnd is

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2.45 watt

24.5 watt

245 watt

2.45 watt

Intensity of light depend on

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Wave length

Amplitude

Velocity

Frequency

The property of bending of light around obstacles is

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Interference

Diffraction

Polarization

Superposition

The dimension of power is

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MLT-1

ML2T-2

ML2T2

ML2T-3

Sound travel faster in

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CO2

H2

O2

He

For 0.0036 no. of significnat digits

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1

3

2

4

In case the work done in zero.

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Constant pressure

Constant volume

Constant temperature

Constant mass

If the radius of droplet becomes half, then its terminal velocity will become.

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Double

Half

One fourth

Remains same

A body of mass 1.0 Kg dropped from the top of a tower of highest 50 m, what will be its K.E. 10 m below the top

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400 J

490 J

49 J

98 J

Identity the non conservative force among the following.

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Frictional force

Electrical force

Gravitational force

Elastic restoring force

Angular velocity determines, How fast or, How slow a body is

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Accelerating

Vibrating

Rotating

Oscillating

A convex lens can be used as

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Simple microscope

Compound microscope

Telescope

Spectrometer

Moment of inertia is measure din

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Kg m2

Kg m-2

Rad s-1

Joule second

The SI unit of power is

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Joule

Newton

Watt

Kilowatt

Work has dimension lime

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Torque

Momentum

Velocity

Power

The work done will be maximum when angle between F and d.

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180^o

0^o

90^o

60^o

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