Electrical Engineering MCQs

Page No. 130

A 10 V power supply would use ____________ as filter capacitor?


apaper capacitor

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bmica capacitor

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c electrolytic capacitor

✓


dair capacitor

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In a npn transistor,_____________are the minority carriers?


a free electrons

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bholes

✓


cdonor ions

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d acceptor ions

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View Answer holes

The input impedance of a transistor is___________?


ahigh

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blow

✓


cvery high

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dalmost zero

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View Answer low

The value of a of a transistor is_____________?


amore than 1

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b less than 1

✓


c1

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dnone of the above

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View Answer less than 1

____________ rectifier has the lowest forward resistance?


a solid state

✓


b vacuum tube

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cgas tube

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dnone of the above

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View Answer solid state

In a tansistor, IC = 100 mA and IE = 100.2 mA. The value of ß is____________?


a100

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b50

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cabout 1

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d200

✓


View Answer 200

A zener diode is destroyed if it______________?


ais forward biased

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bis reverse biased

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ccarrier more than rated current

✓


d none of the above

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The relation between ß and a is______________?


aß = (1 – a ) / a

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bß = 1 / (1 – a )

✖


cß = a / (1 – a )

✓


dß = a / (1 + a )

✖


View Answer ß = a / (1 – a )

The doping level in a zener diode is______________ that of a crystal diode?


athe same as

✖


bless than

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cmore than

✓


dnone of the above

✖


View Answer more than

The phase difference between the input and output voltages in a common base arrangement is___________?


a 180o

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b90o

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c 270o

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d0o

✓


View Answer 0o

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