56. In a series regulator, what is the purpose of fold-back limiting?
(a) to provide more current in the case of a short circuit
(b) to limit output voltage if input voltage goes too high
(c) to bypass the pass-transistor, if the pass-transistor should fail
(d) to provide current up to a maximum, but drop current to a lower value when the output becomes shorted, to prevent overheating of the device
57. Nota
58. Nota
59. Nota
60. ________ regulation can be defined as the percentage change in the output voltage for a given change in the input voltage.
(a) Line
(b) Load
(c) both (a) and (b)
(d) neither (a) and (b)
Related Posts
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
- 5555555555120. The filter output voltage of a power supply ________ when load current is drawn from the supply. (a) remains the same (b) is increased (c) is reduced (d) None of the above