Question # 1

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

In full wave rectification, the output D.C. voltage across the load is obtainedfor

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The positive half cycle of input A.C. (C) The complete cycle of input A.C.

The negative half cycle of input A.C.

The complete cycle of

All of the above

In a full wave rectifier with input frequency 50Hz. The frequency of pulsating D)C) received as an output across the load is

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50 Hz

100 Hz

500 Hz

zero

The magnitude of potential barrier for Ge is

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0.7 v

0.3 V

7v

3 v

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

In full wave rectification by bridge the number of diodes required are

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3

4

2

5

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

The diode charactristics curve is plot between

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I & t

V& t

V& I

None

A diode as a rectifier converts:

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A)c into D)c

D)c into A)c

Varying D)c current into constant D)c current

High voltage into low voltage and vice-versa

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

A device which convert DC into AC is calleD)

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Invertor

Generator

Rectifier

Motor

In a half wave rectifier circuit operating from 50 Hz mains frequency, the fundamental frequency in the ripple would be:

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25 Hz

70.7 Hz

50 Hz

100 Hz

The junction potential for Germanium is;

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3v

0.3 v

7v

0.7 v

A non-inverting amplifier has infinite input resistance then the voltage gain of noninverting amplifier will be:

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Zero

Infinite

One

100

A non-conducting semiconductor diode is:

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Forward biased

Poorly biased

Reverse biased

None of them

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