Question # 1

The frictional effect between the different layers of fluid is called

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Terminal velocity

Stock's law

Viscosity

Surface tension

If a body of mass 5 kg is raised vertically through a distance of 1 m, then work done is.

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49 J

4.9 J

490 J

0.49 J

The terminal velocity can be obtained by using

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Newton's law

Stock's law

Guass's law

None of these

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 value of of 'g' at the centre of the earth is

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Infinite

2 g

3 g

zero

The frequency of waves produced in microwave oven is

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1435 Hz

2450 MHz

1860 MHz

2850 Hz

According to Newton, sound travels in air under conditions of.

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Adiabatic

Isothermal

Isobaric

Isochoric

The angle between x-axis, y-axis and z-axis is

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45°

60°

75°

90°

A heat engine operates between the temperature 1000 K and 400 K, Its efficiency is.

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100%

70%

60%

50%

Example of thin film is.

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Soap burble

convex lens

Concave lens

Glass plate

One revolution is equal to.

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90^o

180^o

360^o

270^o

Damping is the process in which energy

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Increases

Remains constant

Dissipates

None of these

the velocity of sound is maximum at 20 ^oC in

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Lead

Copper

Glass

Iron

According to Huygen's principle the points on primary wave front can be considered as

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Secondary wavelets

Ray of light

Source of light

None of these

The curve representing an adiabatic process is called.

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An adiabatic

An isotherm

Both of these

None of these

A bat finding its correct location by sending

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Matter waves

Ultrasonic waves

Infrasonic waves

electromagnetic waves

The dimensions of work are

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MLT^-1

MLT^-2

ML²T^-2

ML^-1T^-1

The angle between circumference of a circle and center is

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