Basic Electronics (3110016) MCQs

MCQs of AC Analysis of BJT circuits and small signal amplifier

Showing 71 to 80 out of 120 Questions
5 6 7 8 9 10
71.
In order to get more voltage gain from a transistor amplifier, the transistor used should have ____
(a) Thin base
(b) Thin collector
(c) Wide emitter
(d) None of the above
Answer:

Option (a)

72.
The purpose of coupling capacitor in a transistor amplifier is to ________
(a) Increase the output impedance of transistor
(b) Protect the transistor
(c) Pass AC and block DC
(d) Provide biasing
Answer:

Option (c)

73.
The purpose of emitter capacitor (i.e. capacitor across RE) is to _______
(a) Avoid voltage gain drop
(b) Forward bias emitter
(c) Reduce noise in the amplifier
(d) None of the above
Answer:

Option (a)

74.
The ratio of output to input impedance of a CE amplifier is _______
(a) About 1
(b) Low
(c) High
(d) Moderate
Answer:

Option (d)

75.
If a transistor amplifier feeds a load of low resistance (e.g. speaker), then voltage gain will be _____
(a) High
(b) Very high
(c) Moderate
(d) Low
Answer:

Option (d)

76.
If the input capacitor of a transistor amplifier is short-circuited, then ______
(a) Transistor will be destroyed
(b) Biasing conditions will change
(c) Signal will not reach the base
(d) None of the above
Answer:

Option (b)

77.
The radio wave picked up by the receiving antenna is amplified about ______ times to have reasonable sound output
(a) 1000
(b) A million
(c) 100
(d) 10000
Answer:

Option (b)

78.
A CE amplifier is also called ______ circuit
(a) Grounded emitter
(b) Grounded base
(c) Grounded collector
(d) None of the above
Answer:

Option (a)

79.
The DC load of a transistor amplifier is generally ______ that of AC load
(a) The same as
(b) Less than
(c) More than
(d) None of the above
Answer:

Option (c)

80.
The value of collector load RC in a transistor amplifier is _____ the output impedance of the transistor
(a) The same as
(b) Less than
(c) More than
(d) None of the above
Answer:

Option (b)

Showing 71 to 80 out of 120 Questions
5 6 7 8 9 10