Question # 1

The potential difference across depletion region in case of Si is

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0.6 volt

0.9 volt

0.7 volt

0.2 volt

Photodiode is used for:

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Detection of current

Detection of heat

Detection of light

Both a & b

Transistors are made from

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Plastics

Metals

Insulator

Doped semi conductors

Which device is used as a rectifier?

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Capacitor

Transistor

Diode

Transformer

Improper bisting of a transistor circiut produces:

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Heavy loading of emitter current

Distortion in the output output signal

Excessive heat at collector terminal

Faculty location of load line

_______ is the building block of every electronic circuit.

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Semi conductor diode

Resistor

Capacitor

Amplifier

When a PN-Junction is reverse biased the depletion region is.

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Widened

Narrowed

Normal

None of these

The output voltage of a rectifier is.

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Smooth

Pulsating

Alternating

Per featly direct

In a transistor, collector current is controlled by:

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Collector voltage

Base current

Collector resistance

All of the above

The colour of light emitted by a LED depends on.

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It forward biased

Its reverse biased

Unbiased

None of these

Conversion of A.C into D.C is called:

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Compton effect

Rectification

Amplification

Pair production

NAND gate represented by:

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X = A. B

X = A+B

X= A.B

X=|A+B|

Transistor was discovered by

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Young

Curie

John Bardeen

Shale's

The device which is used as amplifier and works with the negative feedback is.

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Operational amplifier

P-n-p transistor

n-p-n transistor

Transistor

The ratio Beta in transistor is called.

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Voltage gain

Emitter gain

Current gain

Nuclear gain

Logic gate can control some physical parameters like.

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Temperature, Pressure

Resistance, Inductance

Capacitance, Impedance

Current, voltage

The circuit of full wave rectification consist of

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Three diodes

Four diodes

Two diodes

One diode

Minimum number of semi conductor diodes required for full wave rectification are.

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1

2

3

4

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