Electronic Devices and Circuit Theory:: Voltage Regulators

The 7812 regulator IC provides ________.

A. 5 V
B. 5 V
C 12 V
D. 12 V

Voltage regulators keep a constant ________ output voltage when the input or load varies within limits.

A. dc
B. ac

Calculate the ripple voltage of a full-wave rectifier with a 75-μF filter capacitor connected to a load drawing 40 mA.

A. 1.20 V
B. 1.28 V
C 1.32 V
D. 1.41 V

In which period is the capacitor filter discharged through the load in a full-wave rectifier?

A. The time during the positive cycle
B. The time during which the diodes are not conducting
C The time during which the diode(s) is (are) conducting
D. The time during the negative cycle

The 7805 regulator IC provides ________.

A. 5 V
B. 5 V
C 12 V
D. 12 V

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