41. In an improved shunt regulator, which of the following components sets the reference voltage?
(a) Transistor Q1
(b) Zener diode
(c) Transistor Q2
(d) RS
42. What is the range of the voltage level of the LM317 adjusted voltage regulator?
(a) 0 V to 5 V
(b) 1.2 V to 37 V
(c) –5 V to –24 V
(d) 5 V to 24 V
43. The 7812 regulator IC provides ________.
(a) 5 V
(b) –5 V
(c) 12 V
(d) –12 V
44. The 7912 regulator IC provides ________ .
(a) 5 V
(b) –5 V
(c) 12 V
(d) –12 V
45. For a full-wave rectifier with ac ripple at 120 Hz, the impedance of a capacitor can be calculated using XC = ________.
(a) 0.707 ÷ C
(b) 1.414 ÷ C
(c) 1.3 ÷ C
(d) 0.785 ÷ C
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