Physics FSC Part 2 Chapter 18 Online MCQ's Test With Answers

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Physics FSC Part 2 Chapter 18 Online MCQ's Test

Sr. # Questions Answers Choice
1 Which one has greater cone of impurity among all: Emitter Base Collector All are pure
2 Base of transistor is of order: 10<sup>-11</sup>m 10<sup>6</sup>m 10<sup>-8</sup>m 10<sup>-6</sup>m
3 A transistor has: Two regions Three regions Single regions Four regions
4 Transistor was invented by: Bardeen Micheal faraday Lenz Newton
5 Photodiode is used for: Detection of current Detection of heat Detection of light Both a &amp; b
6 In case of reverse biasing, current is flown due to: Minority charge carriers Majority charge carriers Electrons Protons
7 The p-n junction in which p side is connected to+ive and n-side is -ve the junction is said to be: Neutral Forward biased Reversed biased None of above
8 The P.D develop in case of germanium is: 0.3 0.7 0.5 0.9
9 The P.D develop in case of silicon is: 0.7V 0.3V 0.5V 0.9V
10 The chargeless region after formation of Pn junction is called: Free region Depletion region Field region U.V region
11 The output from a full wave rectifier is An ac voltage A dc voltage Zero A pulsating unidirectional voltage
12 One use of a single p-n junction semiconductor in an electrical circuit is a Rectifier Transistor Battery Diode
13 The gate, which changes the logic level to its opposite level is called NOR gate AND gate OR gate NOT gate
14 The mathematical symbol for NOR operation is X = A . B X = A + D
15 An expression for gain of an inverting amplifier is (R<sub>1</sub>R<sub>2</sub>) None of these
16 In case of op-amp as an inverting amplifier, V+ - V- = 0, this is because Open gain loop is very low Closed loop gain is very high Open loop gain is very high Both (a) and (a)
17 For normal transistor the emitter current can be given by I<sub>E</sub> = I<sub>C</sub> I<sub>E</sub> = I<sub>C</sub> + I<sub>B</sub> I<sub>E</sub> = I<sub>B</sub> None of these
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