46. What is the limit of the efficiency defined by = Po / Pi?
(a) Greater than 1
(b) Less than 1
(c) Always 1
(d) None of the above
47. Which of the following define(s) the conversion efficiency?
(a) Ac power to the load/ac input power
(b) Ac power to the load/dc power supplied
(c) Dc output power/ac input power
(d) All of the above
48. The ________ model fails to account for the output impedance level of the device and the feedback effect from output to input.
(a) hybrid equivalent
(b) re
(c)
(d) Thevenin
49. What is the range of the current gain for BJT transistor amplifiers?
(a) less than 1
(b) 1 to 100
(c) above 100
(d) All of the above
50. Which of the following techniques can be used in the sinusoidal ac analysis of transistor networks?
(a) Small-signal
(b) Large-signal
(c) Small- or large-signal
(d) None of the above
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