Half Wave Rectifier Questions

A half wave rectifier is the uncomplicated form of the rectifier that lets only one-half cycle of an AC voltage waveform pass while blocking the other half cycle.

Components of half wave rectifiers are:

• A diode
• A resistive load
• A transformer

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Important Half Wave Rectifier Questions with Answers

1. Can we simplify the half wave circuit by replacing the secondary transformer coils with a voltage source?

1. YES
2. NO

Answer: a) YES

Explanation: Yes, the half wave circuit can be simplified by replacing the secondary transformer coils with a voltage source.

2. In a simplified half wave circuit, when the diode is forward biased, it acts as _____.

1. Open switch
2. Closed switch
3. Resistor
4. None of the options

Answer: b) Closed switch

Explanation: When the diode is forward biased, it acts as a closed switch in a simplified half wave circuit.

3. Which is the simplest form of the rectifier?

1. Full wave rectifier
2. Bridge rectifier
3. Half wave rectifier
4. None of the options

Answer: c) Half wave rectifier

Explanation: A half wave rectifier is the simplest form of the rectifier.

4. How many diodes are used by a half wave rectifier circuit for the transformation?

1. No diodes used
2. One
3. Two
4. Four

Answer: b) One

Explanation: A half wave rectifier circuit uses only one diode for the transformation.

5. How many rectifiers does a full wave rectifier use?

1. No diodes used
2. One
3. Multiple diodes
4. None of the options

Answer: c) Multiple diodes

Explanation: A full wave rectifier uses more than one diode.

6. Which type of rectifier is used as a mosquito repellent?

1. Half wave rectifier
2. Full wave rectifier

Answer: a) Half wave rectifier

Explanation: The Half wave rectifier is used as a mosquito repellent to drive the lead for the fumes.

7. Which type of rectifier are the half wave and full wave rectifiers?

1. Controlled Rectifier
2. Uncontrolled Rectifier

Answer: b) Uncontrolled Rectifier

Explanation: Half wave and full wave rectifiers are the types of uncontrolled rectifiers whose voltage cannot be controlled.

8. Rectifier whose voltage can be varied is called ______.

1. Controlled Rectifier
2. Uncontrolled Rectifier

Answer: a) Controlled Rectifier

Explanation: Controlled Rectifiers are those whose voltage can be varied.

9. State true or false: Half wave rectifier is used as a signal peak detector in AM radio.

1. TRUE
2. FALSE

Answer: a) TRUE

Explanation: In AM radio, half wave rectifiers are used as signal peak detectors.

10. Filters in half wave rectifiers are used to transform the pulsating waveform into constant ______.

1. AC waveforms
2. DC waveforms

Answer: b) DC waveforms

Explanation: Filters are used in half wave rectifiers to transform the pulsating waveform into constant DC waveforms.

Practice Questions

1. What is a rectifier?
2. What are the types of rectifiers?
3. What is a half wave rectifier?
4. Give one application of a half wave rectifier.
5. What is a full wave rectifier?