Question # 1

When two identical travelling waves are superimposed, velocity of resultant wave.

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Decreases

Increases

Remain same

Becomes zero

Biomas is a potential source of

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Renewable energy

Non renewable energy

Botha a and b

Tidal energy

The temperature of human body on Kelvin scale is

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210K

310K

410K

510K

Substances that don't flow easily has

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Large co-efficient of viscosity

Small co-efficient of viscosity

Medium co-efficient of viscosity

Zero-coefficient of viscosity

When hot and cold water are mixed, the entropy.

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Decreases

Increases

Remain constant

Zero

A constant temperature, if pressure of a given mass of gas is halved, then its volume becomes.

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Halve

Doubled

Four time

Constant

The force and torque are analogous to

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Velocity

Mass and weight

Moment of Inertia

Each other

Physics bases on Newtonian mechanics is called

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astrophysics

Modern Physics

Classical Physics

Meta Physcis

The wavelength of fundamental note in one end closed pipe in term of length 'l' of pipe is.

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4 l

2l

l

1/4 l

The unit of work in base unit is

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Kg m-1 sec-2

Kgm sec-2

Kgm2 sec-1

Kgm-1 sec-1

For normal adjustment what is the length of astronomical telescope if focal lengths of astronomical telescope if focal lengths of objective and eye piece are 100 cm 20 cm respectively.

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10 cm

20 cm

5 cm

120 cm

Young in 1801 performed experiment for the first time about

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Interference

Diffraction

Polarization

Particle nature of light

The property of bending of light around obstacles is

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Interference

Diffraction

Polarization

Superposition

The light emitted from light emitting diode has wave length.

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1.1 micro meter

1.3 micro meter

1.5 micro meter

1.7 micro meter

If the are of a circle equals its radius, then the angle subtended at the center will be

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1 degree

One rotation

One radian

Half rotation

The magnifying power is also called

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Resolving power

Angular magnification

Strength of eye

None of these

The speed \velocity of sound is greatest in.

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Air

Steel

Ammonia

Water

The wavelength of wave produced by microwave oven is.

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12 cm

12 m

18 m

18 cm

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