Question # 1

For non-ohmic devices, the graph between V and I is

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Not a straight line

A straight line

A curve

All of above

Drift velocity of electrons is.

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10^-1 m/s

10^-2 m/s

10^-3 m/s

10³ m/s

A galvanometer is an electrical instrument used to

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Measure resistance

Measure voltage

Detect passage of current

None of these

Helium Neon Laser Beam emitted from discharge tube has a colour.

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Blue

Green

Red

Black

A current generator device converts:

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Mechanical energy into chemical energy

Chemical energy into electrical energy

Mechanical energy into electrical energy

Both b and c

The SI unit of E is NC-1 and that of B is Na-1 m-1 then the unit of E/B is.

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ms-2

ms

ms^-1

m-1s-1

The mass spectrum of naturally occurring neon, showing

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1 isotope

2 isotope

3 isotope

4 isotope

The current induced can be increased by:

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Using a stronger magnetic field

Moving the loop faster

Replacing the loop bay coi of many turns

All of above

The charge of an alpha particle is equal to

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-e

+e

-2e

2e

Albert Einstein got noble prize for service in:

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Pair production

Annihilation of matter theory

Compton effect

Photoelectric effect

The types of quacks are.

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2

3

4

6

Alpha particle carries a charge.

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-e

+2e

-2e

No charge

The special theory of relativity based on.

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One postulate

Two postulates

Three postulates

Four postulates

In Helium Neon laser, the discharge tube is filled with

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80% He, 20% Neon

85% He, 15% Neon

83% He, 17% Neon

90% He, 10% Neon

NAND gate represented by:

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X = A. B

X = A+B

X= A.B

X=|A+B|

The mass of proton in amu is:

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1.07276

1.7276

1.007276

1.0007276

The self induction emf is some times called.

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Motional emf

Constant emf

Back emf

Variable emf

During negative half cycle of A.c then p-n junction offers.

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High resistance

Low resistance

No resistance

All of these

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