Question # 1

Curie is unit of.

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Conductivity

Binding energy

Radioactivity

Resistivity

I amu =

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9.31 MeV

931 MeV

9.031 MeV

None of above

Radius of first orbit of an atom is r1= 0.053 nm, Radius of second orbit r2 will be.

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0.106 nm

0.212 nm

0.053 nm

0.53 x 10^-10 nm

Albert Einstein got noble prize for service in:

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Pair production

Annihilation of matter theory

Compton effect

Photoelectric effect

In glass, molecules are irregularly arranged so it is known as.

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Solid

Liquid

Solid liquid

Gas

Which of the modulus of elasticity is involved in compressing a rod to decrease its length ?

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Young's modulus

Bulk modulus

Modulus of elasticity

None of these

The activity of radioactive sample

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Is constant

Increases with time

Decreases linearly with time

Decreases exponentially with time

An AVO meter can also be called as.

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Digital multimeter

Digital voltmeter

Digital ammeter

Digital ohm meter

The brightness of the spot of CRO screen is controlled by.

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Anode

Cathode

Grid

Deflecting plates

The value of capacitive reactance is given by

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Xc = VI

All of above

The SI unit of magnetic induction 'B' Tesla is equal to.

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NA-1m-1

Nam-1

NA-1 m

Na2m-1

The highest value reached by the voltage or current is one cycle is called:

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Peak to peak value

Peak value

Instantaneous value

Root mean square value

The unit of work function is

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Electron volt

Ampere

Volt cell

Hz

If a charge is at rest in a magnetic field then force on charge is

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Zero

Double

One fourth

Four times

The gain of transistor amplifier depends upon

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Resistance connected with collector

Resistance connected with base voltage

Input voltage

Output voltage

A positron is an anti particle of.

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Proton

Electron

Neutron

Photon

___ is correct relation.

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IT = 10^-4G

IT = 10⁴ G

IT = 10² G

IT = 10^-2 G

Those elements whose charge number z is greater then __________ are unstable:

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80

79

82

83

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