FW Rectifiers

What is the basic purpose of a rectifier in power electronics?

• Converts DC to AC

• Converts AC to DC

• Amplifies AC

• Reduces AC

A full wave rectifier provides an output for ...

• Half of the input cycle

• The full input cycle

• 
  Only positive half cycl

• Only negative half cycle

The uncontrolled full-wave rectifier is also referred to as ...

• Rectifier diode

• Diode bridge rectifier

• Thyristor rectifier

• Inverter

The power factor for a full-wave uncontrolled rectifier with a resistive load is ...

• 1.00

• 0.707

• 1.414

• 1.57

A center-tapped full-wave rectifier uses how many diodes?

• One

• Two

• Three

• Four

In an uncontrolled full-wave rectifier, the input frequency is 50 Hz. What will be the output frequency?

• 50

• 60

• 100

• 120

For a full-wave uncontrolled rectifier, the output waveform will be ...

• A pure sine wave

• A pure DC

• Pulsating DC

• A square wave

Which of the following devices cannot be used in an controlled rectifier circuit?

• Silicon controlled rectifier

• Diode

• Resistor

• Transformer

Controlled rectifiers are used when ...

• Only AC voltage is needed

• The output voltage needs to be varied

• Pure DC voltage is required

• The input voltage is DC

In a full wave controlled rectifier, the thyristors are turned ON by ...

• Forward voltage

• Gate pulse

• Reverse voltage

• Current pulse