41. The ramp voltage at the output of an op-amp integrator
(a) increases or decreases at a linear rate
(b) increases or decreases exponentially
(c) is always increasing and never decreasing
(d) is constant
42. A two-pole high-pass active filter would have a roll-off rate of
(a) 40 dB/decade
(b) –40 dB/decade
(c) 20 dB/decade
(d) –20 dB/decade
43. A triangular-wave oscillator can consist of an op-amp comparator, followed by a(n)
(a) differentiator
(b) amplifier
(c) integrator
(d) multivibrator
44. Initially, the closed-loop gain (Acl) of a Wien-bridge oscillator should be
(a) Acl < 3
(b) Acl > 3
(c) 0
(d) Acl 1
45. A basic series regulator has
(a) an error detector
(b) a load
(c) a reference voltage
(d) both an error detector and a reference voltage
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