Diode Rectifiers

What is the function of a diode in a rectifier circuit?

• To amplify signals

• To convert AC to DC

• To store electrical energy

• To filter noise

True or False: When reverse biased, a diode allows current to flow.

• True

• False

What type of output does a half-wave rectifier produce?

• Smooth DC

• Varying DC

• AC

• Constant DC

Which component is used in a half-wave rectifier circuit to allow current to pass in one direction only?

• Resistor

• Diode

• Capacitor

• Inductor

In a Centre-Tapped Rectifier, what is the voltage across winding S1?

• The same as the input voltage and of opposite polarity

• Half of the input voltage

• Double the input voltage

• Zero volts

Diode D1 conducts during the ______ half-cycles of the input.

• positive

• negative

• neutral

• zero

How many diodes are used in a bridge rectifier?

Why is a bridge rectifier considered a cheaper and lighter design compared to a centre-tapped rectifier?

• It uses fewer diodes.

• It requires a smaller transformer.

• It has a higher efficiency.

• It provides better voltage regulation.

What is the formula for calculating the ripple factor (w) for a rectified output with a smoothing capacitor?

• w = V_r / V_dc

• w = V_dc / V_r

• w = V_r * V_dc

• w = V_dc - V_r

What happens to the current flow in a diode when it is forward biased?

• Current flows freely

• Current is blocked

• Current is reversed

• Current is amplified