Question # 1

Longitudinal waves do not exhibit

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Reflection

Refraction

Polarization

Diffraction

The frictional effect between the different layers of fluid is called

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Terminal velocity

Stock's law

Viscosity

Surface tension

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 efficiency of diesel engine is about

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25 % to 30%

35% to 40%

40% to 50%

50% to 60%

The maximum range of projectile is 100 km, Take 9=10 ms-2, the initial velocity of the projectile will be.

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1000 kms-1

1 kms-1

10 kms-1

100 kms-1

The potential energy to the molecules of an ideal gas is considered to be.

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Maximum

Zero

1/2 kx²

1/2 kx

The drag force increases as the speed of object

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Become zero

Decreases

Increases

Remains constant

The centre of Newton's fringe is dark due to.

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Destructive interference

Diffraction

Constructive interference

Polarization

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

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Michelson

Hygen's

Galileo

Ability

Light waves are

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Longtail waves

Transvers waves

Stationary waves

Mechanical wave

The magnifying power of a convex lens of focal lendth 10 cm is

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7

9.6

11

3.5

Which material has maximum viscosity

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Glycerin

Plasma

Methanol

Water

73.650 rounded off upto one decimal is

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73.6

74.00

73.7

73.65

Vectors have

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Numerical value

Directional

Both a and b

None of these

Which is the example of vector quantity

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Torque

Speed

Density

Work

Light waves emitted from a source spread in

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Specific direction

All direction

Upward direction

None of these

Which is an example of irreversible process.

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Explosion

Evaporation

Slow compression

A chemical explosion

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