Question # 1

When two waves having same frequency traveling in same direction combine, phenomenon is called

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Wave motion

Combination of waves

Interference

Diffraction

Angular displacement is

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Scalar quantity

Vector quantity

Basic quantity

None of these

The ratio of size of image and size of object is

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Focal length

Magnification

Resolving power

Principle focus

The distance between two consecutive trough is called.

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Displacement

Amplitude

Wave length

Wave front

One mile is equal to

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1.625 km

1.609 km

1.325 km

1.850 km

In stationary waves, the velocity of particle at the node is.

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Maximum

Infinite

Zero

Varible

The optical fiber is covered for protection by a

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Glass Jacket

Plastic Jacket

Copper Jacket

Aluminum Jacket

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

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Adiabatic

Isothermal

Isobaric

Isochoric

At what speed the momentum and kinetic energy of a body having the same.

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1 ms-1

2 ms-1

4 ms-1

8 ms-1

Efficiency of steam locomotive is.

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8%

10%

9%

7%

Half wavelength corresponds to

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0 ^o

90 ^o

180 ^o

360 ^o

The dimensions of angular velocity are

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[LT-1]

[LT-2]

[T-1]

[L-1T-1]

Young in 1801 performed experiment for the first time about

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Interference

Diffraction

Polarization

Particle nature of light

The efficiency of heat engine whose sink is at 17 ^oC and source at 200 ^oC is.

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38%

63%

80%

90%

Pascal is famous for his work

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Hydrodynamics

Hydrostatics

Laws of gases

Behaviour of elastics bodies

A man of mass 5 kg is falling freely, the fore acting on it will be

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5 N

9.8 N

19.6 N

49 N

An oil film on water surface shows colour due to.

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Diffraction

Interference

Polarization

Dispersion

Kilo watt hour is the unit of

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Power

Energy

Force

Torque

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