BSNL TTA Electronics Devices And Circuits Part 2

BSNL TTA Electronics Devices And Circuits Part 2

NOTE-No of questions-193 (last EDC PDF)
ANSWER KEY-Correct answer is indicated by symbol (V) in options.
HINTS-In some questions options E-HINTS is indicating the hints of answer
sample questions and answer

1) In a RC phase shift oscillator, the minimum number of R-C networks to be connected in cascade will be
A [ ]) one.
B [ ]) two.
C [v]) three.
D [ ]) four.

2) Class B amplifier is biased
A [ ]) at midpoint of load line.
B [v]) just at cut-off.
C [ ]) nearly twice cut-off.
D [ ]) none of the above.

3) MOSFET requires
A [ ]) A large input current.
B [v]) Only small input current.
C [ ]) A large input current and high voltage.
D [ ]) None of these.

BSNL TTA Electronics Devices And Circuits Part 2

4) Secondary breakdown occures in
A [v]) BJT but not is MOSFET.
B [ ]) Both BJT and MOSFET.
C [ ]) MOSFET but not in BJT.
D [ ]) None of these.

5) Common emitter current gain hFE of a BJT is
A [ ]) Always constant.
B [ ]) Dependent on base -emitter voltage.
C [ ]) Dependent on collector-emitter voltage.
D [v]) Dependent on collector current.

6) How will electrons flow through a p-channel JFET?
A [ ]) From source to drain.
B [ ]) From source to gate.
C [ ]) From drain to gate.
D [v]) From drain to source.

7) A common-gate amplifier is similar in configuration to which BJT amplifier?
A [ ]) common-emitter
B [ ]) common-collector
C [v]) common-base
D [ ]) emitter-follower

BSNL TTA Electronics Devices And Circuits Part 2

8) The theoretical efficiency of a class D amplifier is
A [ ]) 75%.
B [ ]) 85%.
C [ ]) 90%
D [v]) 100%.

9) A common-source amplifier is similar in configuration to which BJT amplifier?
A [ ]) common-base
B [ ]) common-collector
C [v]) common-emitter
D [ ]) emitter-follower

10) A common-drain amplifier is similar in configuration to which BJT amplifier?
A [ ]) common-emitter
B [v]) common-collector
C [ ]) common-base
D [ ]) common-gate

BSNL TTA Electronics Devices And Circuits Part 2