Question # 1

The efficiency of any heat engine can never be

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+ve

100%

-ve

None of these

[LT-2] is demensional formula for

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Acceleration

Velocity

Force

Momentum

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

Rate of change of velocity is called

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Speed

Acceleration

Displacement

Torque

Teh uncertainty may occur due to

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Limitation of an instrument

Natureal variance of the object

Personal negligence

All of the above

The entropy of the universe with passage of time is.

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Increases

Decreases

Remain constant

Increases and decreases

The speed of stars and galaxies can be calculated by

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Compton effect

Stefan's law

Doppler's effect

Pascal's law

Which remains constant in an adiabatic process.

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Volume

Pressure

entropy

temperature

The direction of angular velocity is determined.

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Left hands rule

Head to tail rule

Right hand rule

General rule

Which of the following is a set of supplementary units

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Radian and kilogram

Radian and Steradian

Steradian and time

Mole and radian

Fringe spacing is inversely proportional to.

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Wave length

Slit separation

Distance between the slit and screen

Frequency of light

When one mirror of a Michelson interferometer is moved a distance of 0.5 mm, 2000 fringes and observed, The wavelength of light used is.

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5000 m

50000 A^o

500 cm

2000 A^o

The units of magnifying power of microscope or telescope are.

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Metre

m^-1

dioptre

No unit

No of spark plugs needed in the diesel engine are.

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0

1

2

3

Information carrying capacity of optical fibre called.

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Capacity

Band width

Immunity

Ability

Satellites are the objects that orbit around the

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Moon

Sun

Earth

Star

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 error in speed of sound calculated by Newton at STP is about.

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0 %

14 %

15 %

16 %

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