MDCAT Physics Chapter 10 Electronics Online Test With Answers

image
image
image

MDCAT Physics Chapter 10 Electronics Online Test

Sr. # Questions Answers Choice
1 In full wave rectification by bridge the number of diodes required are 3 4 2 5
2 The diodes works on A.C D.C both A and B None of these
3 The unit of gain (G) for non-inverting amplifier is Ampere ohm Volt None of these
4 The simplest type of rectification known as half wave rectification is obtained by Using a transistor Suppressing the harmonics in A.C. voltage Suppressing half wave of A.C. supply by using diode Using a Coolidge
5 Inverting amplifier circuits have A very high input impendance A very low input impendance A low output impendance Both A and C
6 In full wave rectification, the output D.C. voltage across the load is obtainedfor 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
7 The method by which only one half of A.C cycle is converted into direct current is called half wave amplification half wave rectification Full wave rectification full wave amplification
8 In a full wave rectifier, the diode conducts during Both halves of the input cycle A portion of the positive half cycle of the input Positive half cycle of the input Positive half cycle of the input Both halves of the input cycle
9 A diode characteristics curve is a graph plotted between; Current and time Voltage and time Voltage and current Forward voltage and reverse current
10 Gain of operational amplifier is independent of; Internal structure External Structure Batteries Potential changes
11 The junction potential for Germanium is; 3v 0.3 v 7v 0.7 v
12 A PN junction diode cannot be use: As rectifier For converting light energy to electrical energy For getting light radiation For increasing the amplitude of an ac signal
13 In a half wave rectifier circuit operating from 50 Hz mains frequency, the fundamental frequency in the ripple would be: 25 Hz 70.7 Hz 50 Hz 100 Hz
14 A diode as a rectifier converts: 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
15 For full wave rectification, the minimum number of diodes used is: 1 2 3 4
16 A pure semiconductor has: An infinite resistance at 0<sup>o</sup>C) A finite resistance which does not depend upon temperature A finite resistance which decreases with temperature A finite resistance which increase with temperature
17 When two semiconductors of p- and n-type are brought into contact, they from a p-n junction which act like a: Conductor Amplifier Oscillator Rectifier
18 The diode charactristics curve is plot between I &amp; t V&amp; t V&amp; I None
19 The magnitude of potential barrier for Ge is 0.7 v 0.3 V 7v 3 v
20 A pulsating DC can be converted into constant voltage by using Filter Full wave rectifier Half wave rectifie Bridge rectifier
Download This Set
×