Question # 1

Total confined light is obtained by

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Total internal reflection

Refraction of light

Diffraction

Polarization

When average velocity becomes equal to instantaneous than body is called moving with.

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Instantaneous acceleration

Constant acceleration

Constant velocity

Variable velocity

Work is negative when angle between F and d is

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45^o

₀^o

90^o

180^o

The mathematical expression for the restoring force is.

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F = kx

F = ma

F = dp/dt

F = -kx

_______ is bio fuel

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Water

Petrol

Ethanol

Oil

The process of confining the beam of light to vibrate in one plane is called.

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Interference

Diffraction

Polarization

Total internal refraction

The apparent change in the pitch of sound due to relative motion is called.

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Carnot theorem

Interference

Doppler effect

Beats

One foot is equal to

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31.90 cm

30.48 cm

30.84 cm

84.30 cm

A frame of reference stationed at the earth is an

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Inertial frame

None internal frame

Accelerated frame

Laboratory frame

The branch of physics which deals with the properties of gravitational field, electromagnetic field and nuclear field is called.

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Aerodynamics

Field theory

Acorestics

Hydrodynamics

Which one is non renewable source of energy.

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Hydro electric

Bio mass

Tides

Oil

If a stretched string 4 m long and it has 4 loops of stationary waves, then the wave length is.

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1m

2 m

3 m

4 m

First law of thermodynamics can be defined by the equation

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The speed of sound in ari at 0 ^oC is 332 ms-1, Then the speed at 40 ^oC will be

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372 ms-1

356 ms-1

346 ms-1

332 ms-1

The instrument which detects the instant as which the external pressure becomes equal to the systolic pressure is called.

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Manometer

Sphygmomanometer

Barometer

Stethoscope

Time period of simple pendulum only depends on

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Mass

Amplitude

Density

Length

Standard metal according to Michelson's interferometer is equivalent to

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1553163.5 wave meter

3 x 108meter

15503000 meter

None of these

In thermodynamics system internal energy decrease by 100 J and 100 J of work done on the system then heat lost will be.

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Zero

100 J

200 J

-200 J

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