Rectifiers

If the ac supply is 60 Hz, what will be the ripple frequency out of the half-wave rectifier?

• 30 Hz

• 50 HZ

• 60 Hz

• 120 Hz

If the AC supply is 50 Hz, what will be the ripple frequency out of the full-wave rectifier?

• 50 Hz

• 60 Hz

• 100 Hz

• 120 Hz

A silicon diode in a half-wave rectifier has a barrier potential of 0.7 V. This has the effect of

• reducing the peak output voltage by 0.7 V

• increasing the peak output voltage by 0.7 V

• reducing the peak input voltage by 0.7 V

• no effect

PIV is which of the following?

• peak input voltage

• peak inverse voltage

• peak immediate voltage

• positive input voltage

Refer to Figure. Which diode arrangement will supply a negative output voltage?

• a

• b

• c

• d

Refer to Figure. Which diode arrangement will supply a positive output voltage?

• a

• b

• c

• d

Each diode in a center-tapped full-wave rectifier is _____ -biased and conducts for _____ of the input cycle.

• forward, 90º

• reverse, 180º

• forward, 180º

• reverse, 90º

What is the PIV for each diode in a full-wave center-tapped rectifier? Note: V_p(out) = peak output voltage.

• V_p(out) – 0.7 V

• V_p(out) + 0.7 V

• 2V_p(out) – 0.7 V

• 2V_p(out) + 0.7 V

If one of the diodes in a bridge full-wave rectifier opens, the output is

• 0 V

• one-fourth the amplitude of the input voltage

• a half-wave rectified voltage

• a 120 Hz voltage

If you are checking a 60 Hz full-wave bridge rectifier and observe that the output has a 60 Hz

ripple,

• the circuit is working properly.

• there is an open diode.

• the transformer secondary is shorted.

• the filter capacitor is leaky.