10 QA on junction transistor | Learn Physics

10 Question-Answer on junction transistor

1.       Transistor parameters

(a)    Never charge

(b)   Are not same even for transistors of the same type

(c)    Always charge

(d)   Are always same

Ans: (b)

2.       Transistor biasing is to

(a)    Select minium proper collector emitter voltage

(b)   Provide proper flows of zero signal collector current

(c)    Always bias in forward direction

(d)   None of above.

Ans: ( b)

3.       A transistor is essentially:

(a)    A current operated device

(b)   Power driven device

(c)    A voltage operated device

(d)   Resistance operated device.

Ans: (a)

4.       Configuration for faithful amplification are

(a)    Proper zero signal collector current

(b)   Minimum proper base emitter voltage

(c)    Minimum proper collector emitter voltage

(d)   All of the above.

Ans: (d)

5.       In common emitter amplifier circuit, phase reversal takes place when output is taken between

(a)    Base and collector

(b)   Collector and emitter

(c)    Both of the above

(d)   None of the above

Ans: ( b)

6.       For any transistor configuration

(a)    Stabilization  is necessary

(b)   Stabilization is not necessary

(c)    Stabilization reduces losses

(d)   None of the above.

Ans: ( a0

7.       Transistor consists of

(a)    Two N-P or P-N junction

(b)   Two P-type layers and two N-type layers in between

(c)    Three semi-conductors layers of some nature

(d)   None of these.

Ans: (a)

8.       Main function of a transistor is to

(a)    Simplify

(b)   Rectify

(c)    Amplify

(d)   Produce music

Ans: ( c)

9.       In  common emitter circuit, current gain is

(a)    zero

(b)   same as in other configuration

(c)    lowest

(d)   highest

Ans: ( d)

10.       in common base circuit, output resistance is:

(a)    very high

(b)   low

(c)    very low

(d)   moderate

Ans: (d)