Question # 1

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

Choose an answer

Conductor

Amplifier

Oscillator

Rectifier

In a full wave rectifier, the diode conducts during

Choose an answer

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

Gain of operational amplifier is independent of;

Choose an answer

Internal structure

External Structure

Batteries

Potential changes

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

Choose an answer

Zero

Infinite

One

100

A pulsating DC can be converted into constant voltage by using

Choose an answer

Filter

Full wave rectifier

Half wave rectifie

Bridge rectifier

A PN junction diode cannot be use:

Choose an answer

As rectifier

For converting light energy to electrical energy

For getting light radiation

For increasing the amplitude of an ac signal

A diode as a rectifier converts:

Choose an answer

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 junction potential for Germanium is;

Choose an answer

3v

0.3 v

7v

0.7 v

The diode charactristics curve is plot between

Choose an answer

I & t

V& t

V& I

None

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

Choose an answer

50 Hz

100 Hz

500 Hz

zero

The diodes works on

Choose an answer

A.C

D.C

both A and B

None of these

A non-conducting semiconductor diode is:

Choose an answer

Forward biased

Poorly biased

Reverse biased

None of them

The efficiency of half wave rectifier is:

Choose an answer

25.6%

1.2%

40.6%

66.6%

The efficiency of full wave rectifier is:

Choose an answer

25.6%

81.2%

81.6%

71.2%

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

Choose an answer

25 Hz

70.7 Hz

50 Hz

100 Hz

The power output of a full wave rectifier is:

Choose an answer

Equal to H.W.R

Twice of H.W.R

Half of H.W.R

Four times of H.W.R

A certain noninverting amplifier has R1 of 1 kΩ and R2 of 100 kΩ. The closed-loop voltage gain is ………

Choose an answer

100,000

100

1000

101

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

Choose an answer

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

For the same value of resistors the output of non-inverting amplifier compared to the output of inverting amplifier is, (ignoring phase difference)

Choose an answer

Greater

Equal

Smaller

Undefined

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

Choose an answer

3

4

2

5

More Classes

Other Links

MDCAT Physics Chapter 10 Electronics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer