BJT Amplifiers » Exercise – 2
51. What is the typical value of the current gain of a common-base configuration?
(a) Less than 1
(b) Between 1 and 50
(c) Between 100 and 200
(d) Undefined
52. What is the controlling current in a common-base configuration?
(a) Ie
(b) Ic
(c) Ib
(d) None of the above
53. What is the range of the input impedance of a common-base configuration?
(a) A few ohms to a maximum of 50
(b) 1 k to 5 k
(c) 100 k to 500 k
(d) 1 M to 2 M
54. Under which of the following condition(s) is the current gain ?
(a) ro 10RC
(b) RB 10re
(c) ro 10RC and RB 10re
(d) None of the above
55. What is the typical range of the output impedance of a common-emitter configuration?
(a) 10 to 100
(b) 1 k to 5 k
(c) 40 k to 50 k
(d) 500 k to 1 k
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