MDCAT Physics Chapter 14 Electronics MCQ's Test

MCQ's Test For MDCAT Physics Chapter 14 Electronics MCQ's Test

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MDCAT Physics Chapter 14 Electronics MCQ's Test

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Question # 1

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

Question # 2

The diode charactristics curve is plot between

Question # 3

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

Question # 4

The efficiency of half wave rectifier is:

Question # 5

A diode characteristics curve is a graph plotted between;

Question # 6

The magnitude of potential barrier for Ge is

Question # 7

In a full wave rectifier:

Question # 8

A pure semiconductor has:

Question # 9

The power output of a full wave rectifier is:

Question # 10

A PN junction diode cannot be use:

Question # 11

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

Question # 12

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

Question # 13

The diodes works on

Question # 14

In a full wave rectifier, the diode conducts during

Question # 15

A circuit that converts Pulsating DC into smooth DC contain :

Question # 16

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

Question # 17

A device which convert DC into AC is calleD)

Question # 18

The efficiency of full wave rectifier is:

Question # 19

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

Question # 20

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

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MCAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 For a normal AC cycle, during T/2 to T the diode act as:
A. Open switch
B. full wave rectifier
C. Close switch
D. All are correct
2 For full wave rectification, the minimum number of diodes used is:
A. 1
B. 2
C. 3
D. 4
3 In a full wave rectifier, the diode conducts during
A. Both halves of the input cycle
B. A portion of the positive half cycle of the input
C. Positive half cycle of the input
D. Positive half cycle of the input
4 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
5 A device which convert DC into AC is calleD)
A. Invertor
B. Generator
C. Rectifier
D. Motor
6 The magnitude of potential barrier for Ge is
A. 0.7 v
B. 0.3 V
C. 7v
D. 3 v
7 The power output of a full wave rectifier is:
A. Equal to H.W.R
B. Twice of H.W.R
C. Half of H.W.R
D. Four times of H.W.R
8 A diode as a rectifier converts:
A. A)c into D)c
B. D)c into A)c
C. Varying D)c current into constant D)c current
D. High voltage into low voltage and vice-versa
9 The unit of gain (G) for non-inverting amplifier is
A. Ampere
B. ohm
C. Volt
D. None of these
10 The efficiency of full wave rectifier is:
A. 25.6%
B. 81.2%
C. 81.6%
D. 71.2%

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