Power Supply Quiz

What is the primary function of a power supply?

• To store electrical energy

• To take input voltage and convert it into the proper amount of voltage needed

• To increase the frequency of the input signal

• To provide backup power during outages

Which of the following is NOT a function of a transformer in a power-supply circuit?

• Steps up and down voltage

• Electrically isolates the primary circuit from the secondary circuit

• Supplies a variable of AC voltage

• Converts AC to DC

What does rectification mean in the context of a power supply?

• To increase voltage

• To change AC to DC

• To decrease current

• To stabilize frequency

Which electronic device is commonly used as a rectifier in power supplies?

• Transistor

• Capacitor

• Diode

• Resistor

How does a half-wave rectifier differ from a full-wave rectifier in terms of DC output voltage?

• Half-wave rectifier uses both halves of the AC waveform

• Full-wave rectifier uses only one half of the AC waveform

• Half-wave rectifier has a lower average DC voltage

• Full-wave rectifier has a higher ripple

How many diodes does a bridge rectifier have compared to a center-taped rectifier?

• 2 diodes for bridge, 1 for center-taped

• 4 diodes for bridge, 1 for center-taped

• 3 diodes for bridge, 2 for center-taped

• 5 diodes for bridge, 3 for center-taped

What is the amount of reverse voltage that diodes must withstand in a rectifier circuit?

• Equal to the forward voltage

• Half the amount of the reverse voltage

• Twice the amount of the reverse voltage

• Three times the amount of the reverse voltage

How many diodes are required for a three-phase, full-wave bridge rectifier?

• 3 diodes

• 4 diodes

• 6 diodes

• 8 diodes

What is the role of a transformer in a power-supply circuit?

• To convert DC to AC

• To step up and down voltage

• To store electrical energy

• To filter noise

Which component is responsible for electronically isolating the primary circuit from the secondary circuit?

• Resistor

• Transformer

• Capacitor

• Inductor