Question # 1

The diode charactristics curve is plot between

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I & t

V& t

V& I

None

The resistance of operational amplifier between inverting and non-inverting terminal is of the order of:

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Few Ohms

Mega Ohms

Few Kilo Ohms

Micro Ohms

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 efficiency of half wave rectifier is:

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25.6%

1.2%

40.6%

66.6%

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

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

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1

2

3

4

The magnitude of potential barrier for Ge is

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0.7 v

0.3 V

7v

3 v

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

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Ampere

ohm

Volt

None of these

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

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

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

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

Gain of operational amplifier is independent of;

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Internal structure

External Structure

Batteries

Potential changes

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 non-conducting semiconductor diode is:

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Forward biased

Poorly biased

Reverse biased

None of them

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