Question # 1

For full wave rectification, the minimum number of diodes used is:

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1

2

3

4

When two semiconductors of p- and n-type are brought into contact, they from a p-n junction which act like a:

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Conductor

Amplifier

Oscillator

Rectifier

Inverting amplifier circuits have

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A very high input impendance

A very low input impendance

A low output impendance

Both A and C

A PN junction diode cannot be use:

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As rectifier

For converting light energy to electrical energy

For getting light radiation

For increasing the amplitude of an ac signal

The method by which only one half of A.C cycle is converted into direct current is called

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half wave amplification

half wave rectification

Full wave rectification

full wave amplification

The power output of a full wave rectifier is:

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Equal to H.W.R

Twice of H.W.R

Half of H.W.R

Four times of H.W.R

The unit of gain (G) for non-inverting amplifier is

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Ampere

ohm

Volt

None of these

For a normal AC cycle, during T/2 to T the diode act as:

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Open switch

full wave rectifier

Close switch

All are correct

A pulsating DC can be converted into constant voltage by using

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Filter

Full wave rectifier

Half wave rectifie

Bridge rectifier

A pure semiconductor has:

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An infinite resistance at 0^oC)

A finite resistance which does not depend upon temperature

A finite resistance which decreases with temperature

A finite resistance which increase with temperature

In a full wave rectifier, the diode conducts during

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Both halves of the input cycle

A portion of the positive half cycle of the input

Positive half cycle of the input

Both halves of the input cycle

A non-conducting semiconductor diode is:

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Forward biased

Poorly biased

Reverse biased

None of them

The simplest type of rectification known as half wave rectification is obtained by

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Using a transistor

Suppressing the harmonics in A.C. voltage

Suppressing half wave of A.C. supply by using diode

Using a Coolidge

Gain of operational amplifier is independent of;

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Internal structure

External Structure

Batteries

Potential changes

A device which convert DC into AC is calleD)

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Invertor

Generator

Rectifier

Motor

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