Question # 1

Pulsating output of full wave rectifier can be made smooth by using circuit called.

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Filter

Amplifier

Resistor

Transistor

The output voltage of a rectifier is.

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Smooth

Pulsating

Alternating

Per featly direct

The output of two input is zero only when its.

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Both inputs are zero

Either input is zero

Both inputs are one

Either input is one

A photo diode can turn its current ON and OFF in

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Micro seconds

Mega seconds

Nano seconds

Mili seconds

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 of potential barriers of Ge to Si at room temperatrue is.

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7:3

1:3

2:5

3:7

Conversation of only one half of A.C. into D.C. is called.

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Half wave amplification

Wave amplification

Half wave electrification

Half wave rectification

The impurity in the germinium is usually in the ratio of

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1:10⁶

1:10⁴

1:10⁸

1:10¹⁰

A PN junction can not be sued a.

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Rectifier

Amplifier

Detector

LED

The potential barrier for silicon is.

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0.7 V

0.5 V

0.3 V

0.9 V

Base of transistor is of order:

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10^-11m

10⁶m

10^-8m

10^-6m

A transistor has:

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Two regions

Three regions

Single regions

Four regions

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

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Compton effect

Rectification

Amplification

Pair production

Which one has greater cone of impurity among all:

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Emitter

Base

Collector

All are pure

Which is not fundamental logic gate.

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NOT

AND

OR

NAND

The ratio Beta in transistor is called.

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Voltage gain

Emitter gain

Current gain

Nuclear gain

The colour of light emitted by a LED depends on.

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It forward biased

Its reverse biased

Unbiased

None of these

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