BJT Amplifiers – Exercise – 2

66. The ________ the source resistance and/or ________ the load resistance, the less the overall gain of an amplifier.

(a) smaller, smaller
(b) smaller, larger
(c) larger, smaller
(d) larger, larger

Answer
Answer : (c)
Explanation
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67. In an unbypassed emitter bias configuration hie replaces ________ in the re model.

(a) re
(b)
(c) re
(d) Ib

Answer
Answer : (c)
Explanation
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68. Which of the following represent(s) the advantage(s) of the system approach over the r-model approach?

(a) Thevenin’s theorem can be used.
(b) The effect of changing the load can be determined by a simple equation.
(c) There is no need to go back to the ac equivalent model and analyze the entire network.
(d) All of the above

Answer
Answer : (d)
Explanation
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69. In an emitter-follower, the voltage gain is ________.

(a) slightly less than 1
(b) slightly more than 1
(c) a very large value
(d) None of the above

Answer
Answer : (a)
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70. In a fixed-bias network, the input signal Vi is applied to the ________ of the transistor while the output Vo is off the ________.

(a) base, collector
(b) base, emitter
(c) emitter, collector
(d) None of the above

Answer
Answer : (a)
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