Question # 1

The background radiation to which we are exposed, on the average is.

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1 mSv per year

2 mSv per year

3 mSv per year

4 mSv per year

Shunt resistance is

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Low resistance

Zero resistance

High resistance

Impedance

For computation of electric flux, the surface area should be.

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Parallel

Flat

Curved

Spherical

The sensor of light is.

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Transistor

LED

Diode

Light dependent resistance

The heat produced by passage of current.

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H=I²Rt

H=IR2T

H=I/Rt

H=I²/Rt

The photon with energy greater than 1.02 MeV can interact with matter as.

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Photoelectric effect

Compton effect

Pair production

annihilation of matter

One use of a single p-n junction semiconductor in an electrical circuit is a

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Rectifier

Transistor

Battery

Diode

Nuclear fission was discovered by:

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Otto Hahn

Friz strassmann

Both a and b

Michaelson

The quantity time constant RC has units of.

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Charge

Time

Capacitance

Resistance

The idea of laser device was first introduced by C.H. Towners and Authers Schowlan is

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1972

1965

1958

1913

In Millikan's oil drop experiment a charged particle of mass 'm' is in equilibrium in an will

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Zero

g/2

g

2g

Vrms =

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0.7V_∘

0.07V_∘

0.007V_∘

0.75V_∘

The p-n junction in which p side is connected to+ive and n-side is -ve the junction is said to be:

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Neutral

Forward biased

Reversed biased

None of above

Natural rubber is an example of:

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Crystalline solids

Amorphous solids

Polymeric solids

None of above

Application of wave like nature of particle is

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Photodiode

Optical microscope

Electron microscope

Compound microscope

The P.D develop in case of germanium is:

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0.3

0.7

0.5

0.9

The Weber is unit of measure of:

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Conductance

Electric current

Magnitic flux

Electric flux

Circulation of blood is studied by radio isotope.

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Cobalt -60

Phosphorus -32

Sodium -24

Iodine -131

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