BJT and FET Frequency Response » Exercise – 2
51. At very high frequencies, the effect of Ci is to ________ the total impedance of the parallel combination of R1, R2, R3, and Ci.
(a) increase
(b) maintain
(c) decrease
(d) None of the above
52. The logarithm of a number ________ than 1 is always ________.
(a) greater, negative
(b) less, positive
(c) less, negative
(d) None of the above
53. The decibel (dB) is defined such that ________ decibel(s) = ________ bel(s).
(a) 1, 10
(b) 10, 1
(c) 1, 1
(d) 10, 10
54. A change in frequency by a factor of 2 results in a ________ change in the ratio of the normalized gain.
(a) 3-dB
(b) 6-dB
(c) 10-dB
(d) 20-dB
55. In the input RC circuit of a single-stage BJT or FET amplifier, as the frequency ________, the capacitive reactance ________ and ________ of the input voltage appears across the output terminals.
(a) increases, decreases, more
(b) increases, decreases, less
(c) increases, increases, more
(d) decreases, decreases, less
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