Electrical Engineering MCQs

Page No. 33

The zero signal IC is generally ______________ mA in the initial stages of a transistor amplifier?


a4

✖


b1

✓


c3

✖


dMore than 10

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View Answer 1

The point of intersection of d.c. and a.c. load lines represents __________________?


aOperating point

✓


bCurrent gain

✖


cVoltage gain

✖


dNone of the above

✖


View Answer Operating point

For faithful amplification by a transistor circuit, the value of VCE should______________for silicon transistor?


aNot fall below 1 V

✓


b Be zero

✖


cBe 0.2 V

✖


dNone of the above

✖


View Answer Not fall below 1 V

Operating point represents__________________?


aValues of IC and VCE when signal is applied

✖


bThe magnitude of signal

✖


cZero signal values of IC and VCE

✓


dNone of the above

✖



Transistor biasing represents ______________ conditions?


aa.c

✖


bd.c

✓


cboth a.c. and d.c

✖


dnone of the above

✖


View Answer d.c

For proper operation of the transistor, its collector should have___________________?


aProper forward bias

✖


bProper reverse bias

✓


cVery small size

✖


d None of the above

✖


View Answer Proper reverse bias

If biasing is not done in an amplifier circuit, it results in________________?


aDecrease in the base current

✖


bUnfaithful amplification

✓


cExcessive collector bias

✖


dNone of the above

✖



At absolute temperature, an intrinsic semiconductor has________________?


aA few free electrons

✖


bMany holes

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cMany free electrons

✖


dNo holes or free electrons

✓



A reverse biased pn junction has resistance of the order of________________?


aO

✖


bkO

✖


cMO

✓


d None of the above

✖


View Answer MO

A reverse bias pn junction has_____________?


aVery narrow depletion layer

✖


bAlmost no current

✓


cVery low resistance

✖


dLarge current flow

✖


View Answer Almost no current

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