76. The ________ values of capacitor filter provide ________ ripple and ________ average voltage.
(a) larger, more, higher
(b) smaller, less, lower
(c) smaller, more, higher
(d) larger, less, higher
77. IC units provide regulation of ________.
(a) a fixed positive voltage
(b) a fixed negative voltage
(c) an adjustably set voltage
(d) All of the above
78. The ________ is (are) an adjustable voltage regulator.
(a) series 7800 ICs
(b) series 7900 ICs
(c) LM317
(d) None of the above
79. The 7805 regulator IC provides ________.
(a) 5 V
(b) –5 V
(c) 12 V
(d) –12 V
80. The ________ the ac variation with respect to the dc level, the ________ the filter circuit’s operation.
(a) smaller, better
(b) larger, better
(c) smaller, worse
(d) None of the above
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5555555555 66. A voltage regulator with a no-load output dc voltage of 12 V is connected to a load with a resistance of 10 Ω. If the load resistance decreases to 7.5 Ω, the load voltage will decrease to 10.9 V. The load current will be ________, and the percent load regulation is ________. (a) 1.45 A, 90.8% (b) 1.45 A, 10.09% (c) 1.2 A, 90.8% (d) 1.2 A, 10.09%- 5555555555 65. A voltage regulator has a no-load output of 18 V and a full-load output of 17.3 V. The percent load regulation is ________. (a) 0.25%. (b) 96.1%. (c) 4.05%. (d) 1.04%.
- 555555555545. 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
- 5555555555 47. Voltage regulators keep a constant ________ output voltage when the input or load varies within limits. (a) dc (b) ac (c) ripple (d) none of these
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