Question # 1

The life time of metastable state is equal to

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Life time of excited state

Greater than by excited state

Zero

Less than by excited state

An inkjet printer uses in its operation:

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Neutrons only

Mesons only

Positrons and photons

An electric charge

None of these

Electric flux is defined by the relation

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E.A.

E x A

E/A

none of these

The reciprocal of decay constant λ of a radioactive material is:

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Frequency

Half life

Year

Mean life

None of these

At high speed, fluid friction _____ and fuel consumption ___,:

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Increases, decreases

Increases, increases

Decreases, increases

None of these

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

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zero

small

large

very large

The temperature at which the vibrations become so great that structure of the Crystal breaks up, is called:

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Critical temparature

Temperature of vaporization

Melting point

Both (A) and (C)

Both (A) and (B)

The spectrum emitted from hydrogen filled discharge tube is:

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Line spectrum

Discrete spectrum

And spectrum

Absorption spectrum

Both (A) and (B)

Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as

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waves

beat

interference

resonance

An induced current can be produced by:

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Constant magnetic field

Changing magnetic field

Varying magnetic feild

Constant electric field

None of these

Within each domain, the magnetic field of all the spinning electrons are

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parallel

antiparallel

perpendicular

all of them

An accurate measurement is the one which has

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Percertainity

Less percentage uncertainty

Less fractional uncertainty

b and c

The height at which the satellite stay directly above a particular point on the surface of the earth above the equator is

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24000 km

36000 km

42000 km

None of these

If a source of light is moving away from stationary observer then frequency of light wave appears to change because of

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Doppler's effect

Interference

Diffraction

None of the above

Significant figure in 0.00110

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One

Two

Three

Four

Which type of optical fiber has the largest diameter

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Single mode step index fiber

Multi-mode step index fiber

Multi-mode graded index fiber

None of these

All possible process/processes to get plane polarized light

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Reflection from different surfaces

Refraction through crystals

Scattering by small particles

All of these

a constant force F is applied to keep the particle moving with uniform velocity V.Then the power required is

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1/2 FV²

FV²

FV

F/V

Bulk modulus for aluminium is

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40

70

75

95

Torque of a force is a vector quantity, its direction is determined by

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Right hand rule

Knowing the direction of F

Knowing the position of origin

none of these

Shear modulus for steel is

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20

84

95

202

Blood vessels are not

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Flexible

Rigid

Some times flexible

None of these

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