MDCAT Physics mcq test with answers for chapter 14 (Electronics)

Question # 1

Inverting amplifier circuits have

A very high input impendance A
A very low input impendance B
A low output impendance C
Both A and C D

Question # 2

A device which convert DC into AC is calleD)

Invertor A
Generator B
Rectifier C
Motor D

Question # 3

The efficiency of half wave rectifier is:

25.6% A
1.2% B
40.6% C
66.6% D

Question # 4

In full wave rectification, the output DC voltage across the load is obtained for.

The positive half cycle of input AC only A
The negative half cycle of input AC B
The completes cycle of input AC only C
All of the above D

Question # 5

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

50 Hz A
100 Hz B
500 Hz C
zero D

Question # 6

The diode charactristics curve is plot between

I & t A
V& t B
V& I C
None D

Question # 7

A pulsating DC can be converted into constant voltage by using

Filter A
Full wave rectifier B
Half wave rectifie C
Bridge rectifier D

Question # 8

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

Few Ohms A
Mega Ohms B
Few Kilo Ohms C
Micro Ohms D

Question # 9

A PN junction diode cannot be use:

As rectifier A
For converting light energy to electrical energy B
For getting light radiation C
For increasing the amplitude of an ac signal D

Question # 10

A diode characteristics curve is a graph plotted between;

Current and time A
Voltage and time B
Voltage and current C
Forward voltage and reverse current D

Question # 11

The magnitude of potential barrier for Ge is

0.7 v A
0.3 V B
7v C
3 v D

Question # 12

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

Zero A
Infinite B
One C
100 D

Question # 13

In a full wave rectifier, the diode conducts during

Both halves of the input cycle A
A portion of the positive half cycle of the input B
Positive half cycle of the input C
Positive half cycle of the input D
Both halves of the input cycle E

Question # 14

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

25 Hz A
70.7 Hz B
50 Hz C
100 Hz D

Question # 15

A circuit that converts Pulsating DC into smooth DC contain :

Filter A
Capacitor B
Inductor C
LC circuit D

Question # 16

In a full wave rectifier:

DC current is twice that of half wave rectifier A
DC pulses are twice per cycle that of half wave rectifier B
DC voltage is twice that of half wave rectifier C
All are correct D

Question # 17

A diode as a rectifier converts:

A)c into D)c A
D)c into A)c B
Varying D)c current into constant D)c current C
High voltage into low voltage and vice-versa D

Question # 18

Gain of operational amplifier is independent of;

Internal structure A
External Structure B
Batteries C
Potential changes D

Question # 19

The diodes works on

A.C A
D.C B
both A and B C
None of these D

Question # 20

The efficiency of full wave rectifier is:

25.6% A
81.2% B
81.6% C
71.2% D

Sr.#	Question	Answer
1	In a full wave rectifier with input frequency 50Hz. The frequency of pulsating D)C) received as an output across the load is	A. 50 Hz B. 100 Hz C. 500 Hz D. zero
2	In full wave rectification by bridge the number of diodes required are	A. 3 B. 4 C. 2 D. 5
3	The unit of gain (G) for non-inverting amplifier is	A. Ampere B. ohm C. Volt D. None of these
4	A pulsating DC can be converted into constant voltage by using	A. Filter B. Full wave rectifier C. Half wave rectifie D. Bridge rectifier
5	In full wave rectification, the output D.C. voltage across the load is obtainedfor	A. The positive half cycle of input A.C. (C) The complete cycle of input A.C. B. The negative half cycle of input A.C. C. The complete cycle of D. All of the above
6	The efficiency of full wave rectifier is:	A. 25.6% B. 81.2% C. 81.6% D. 71.2%
7	The resistance of operational amplifier between inverting and non-inverting terminal is of the order of:	A. Few Ohms B. Mega Ohms C. Few Kilo Ohms D. Micro Ohms
8	A device which convert DC into AC is calleD)	A. Invertor B. Generator C. Rectifier D. Motor
9	The diode charactristics curve is plot between	A. I & t B. V& t C. V& I D. None
10	Inverting amplifier circuits have	A. A very high input impendance B. A very low input impendance C. A low output impendance D. Both A and C

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MDCAT Physics Chapter 14 MCQ Test With Answer for (Electronics)

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