Question # 1

Selenium is a

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Insulator

Photoconductor

Conductor

First insulator then conductor

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

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80

79

82

83

Farad is defined as

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"Coulomb/Volt

Ampere /Volt

Coulomb /Joule

Volt/Coulomb

NIBA =

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cθ

θ/c

c²θ

c²/θ

The mass of protons is:

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1.675 x 10^-27 kg

1.693 x 10^-27 kg

1.673 x 10^-31 kg

1.673 x 10^-27 kg

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

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Solid

Liquid

Solid liquid

Gas

The negative of the potential gradient is

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Electrostatic force

Electromotive force

Potential difference

Electric field intensity

the force between two charge is 28 N. If paraffin wax of relative permittivity 2.8 is introduced between the charges as medium, then the force reduces to.

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25 N

20 N

10 N

15 N

The heat produced by passage of current.

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H=I²Rt

H=IR2T

H=I/Rt

H=I²/Rt

The ratio of applies stress to volumetric strain is called:

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Young modulus

Shear modulus

Bulk modulus

Tensile modulus

The sum of positive and negative peak value called.

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R.M.S. value

P-P value

Peak value

Average value

Bottom quark carries charge :

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2/3 e

-2/3 e

+1/3 e

-1 /3 e

In the capacitive circuit of A.C. quantity when q= 0 the slope of q-t curve is.

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Maximum

Minimum

Zero

Negative

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

Iodine -131 is used for the treatment by

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Bones

Eyes

thyroid glands

Lungs

The existence of positron in 1928 was predicted by

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Anderson

Dirac

Chadwick

Plank

The Lenz's law is also statement of:

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Law of conservation of mass

Law of conservation of charge

Law of conservation of energy

Law of conservation of momentum

A sensitive galvanometer is

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Unstable

Stable

Moderate

Both B and C

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