Question # 1

The position has charge which is in magnitude equal to the charge on

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Electron

Proton

β particle

All

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

The self induction emf is some times called.

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Motional emf

Constant emf

Back emf

Variable emf

The number of crystal system are

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Three

Five

Seven

Fifteen

The quantity time constant RC has units of.

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Charge

Time

Capacitance

Resistance

Which device is used as a rectifier?

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Capacitor

Transistor

Diode

Transformer

The P.D develop in case of silicon is:

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0.7V

0.3V

0.5V

0.9V

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

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Rectifier

Transistor

Battery

Diode

In frequency modulation which factor changed.

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Amplitude of charge carriers

Frequency of charge carriers

Amplitude of signal

Frequency of signal

Specific resistance of a material depends upon.

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Length

Area

Temperature

Both A and B

Helium-Neon laser discharge tube contains neon

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82%

15%

25%

85%

The unit of resistance is:

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Ω

Ωm

Ω^-1m^-1

Ωm^-1

Mutual induction play role in.

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Generator

D.C. motor

Galvanometer

Transformer

The special theory of relativity based on.

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One postulate

Two postulates

Three postulates

Four postulates

LDR becomes necessary when op amp is used as a

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Night switch

Inverter

Comparator

Rectifier

Two resistance of 2 Ohm each are connected in parallel combination equivalent resistance will be.

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4 Ohm

2 Ohm

1 Ohm

8 Ohm

Antiparticle of electron is.

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proton

Photon

Positron

Neutron

If the kinetic energy of a free electron doubles, its de Broglie wavelength changes by the factor.

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√2

1/√2

2

1/2

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