DC Power Supply

In a power supply diagram, which block indicates a smooth dc output?

• transformer

• filter

• rectifier

• regulator

If a 169.7 V half-wave peak has an average voltage of 54 V, what is the average of two full-wave peaks?

• 119.9 V

• 108.0 V

• 115.7 V

• 339.4 V

A filtered full-wave rectifier voltage has a smaller ripple than does a half-wave rectifier voltage for the same load resistance and capacitor values because:

• there is a shorter time between peaks

• there is a longer time between peaks

• the larger the ripple, the better the filtering action

• none of the above

What is the current through the diode?

• 1 mA

• 0.975 mA

• 0.942 mA

• 0.0 mA

Shunting the ac component away from the load is the task of a:

• transformer

• filter

• regulator

• rectifier

With full-wave rectification, current through the load resistor must be:

• in opposite directions

• to the external load

• from the reverse biased diode

• in the same direction

What is the peak output voltage for this half-wave rectifier?

• 1 V

• 7.8 V

• 10.9 V

• 11.3 V

Providing a constant output regardless of ac input or load resistance changes is the function of a:

• transformer

• filter

• regulator

• rectifier

DC power should be connected to forward bias a diode as follows:

• – anode, + cathode

• – cathode, – anode

• + anode, – cathode

• + cathode, + anode

In a power supply diagram, which block indicates a pulsating dc output?

• transformer

• filter

• rectifier

• regulator