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

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Physics ICS Part 2 Chapter 18 Online MCQ's Test

Sr. # Questions Answers Choice
1 When a PN-Junction is reverse biased the depletion region is. Widened Narrowed Normal None of these
2 Reverse current flows due to Majority charge carriers Minority charge carriers Electrons Holes
3 The potential difference across the depletion region of germanium is. 0.3 V 0.5 V 0.7 V 0.8 V
4 The potential barrier for silicon is. 0.7 V 0.5 V 0.3 V 0.9 V
5 In a transistor, collector current is controlled by: Collector voltage Base current Collector resistance All of the above
6 In a transistor, collector current is controlled by: Collector voltage Base current Collector resistance All of the above
7 Most of the electrons in the base of an NPN transistor flow: Out of the base lead Into the collector Into the emit Into the base supply
8 When transistor are used in digital circuits they usually operate in the : Active region Break down region Saturation & cutoff regions Linear region
9 Improper bisting of a transistor circiut produces: Heavy loading of emitter current Distortion in the output output signal Excessive heat at collector terminal Faculty location of load line
10 The reverse saturation current in a PN junction diode is only due to: Majority carriers Minoritycarriers Acceptor ions Donor ions
11 In an N-type silicon, which of the following statement is true? Electrons are majority carriers & trivalent atoms are the dopants Electrons are majority carriers & pentavalent atoms are the dopants Holes are minority carriers & pentavalent atoms are the dopants. Holes are minority carriers & trivavalent atoms are the dopants.
12 Which device is used as a rectifier? Capacitor Transistor Diode Transformer
13 A transistor has parts: 2 3 4 5
14 Conversion of A.C into D.C is called: Compton effect Rectification Amplification  Pair production
15 OR gate is represented by: X = A+B X=A.B X=A+B X=A.B
16 NAND gate represented by: X = A. B X = A+B X= A.B X=|A+B|
17 For normal use: Emitter base function is reversed biased Collector base junction is reserved biased Emitter base junction is forward biased Both c and b
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