A33 -Mains Power Supplies - rectification, smoothing and stabilisation

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How many diodes are used in a half wave rectifier?
1. 1
2. 2
3. 3
4. 4
In a power supply, which type of rectifier requires a centre tapped transformer
1. All of them
2. Half wave rectifier
3. Full wave rectifier
4. Full wave bridge rectifier
The smoothing section of a power supply is most like;y to use capacitors in the range
1. 2uF to 8uF
2. 2nF to 2000nF
3. 2pF to 2000pF
4. 0.2pF to 200pF
Which of these is notused as a type of voltage stabilisation
1. A varicap diode
2. Zener diode
3. A zener diode together with a pass transistor in the form of an emitter follower circuit
4. An IC voltage regulator
In addition to fixed capacitors, voltage smoothing units may also include:
1. A varicap diode
2. A variable resistor
3. An inductor
4. A variable capacitor

A33 -Mains Power Supplies - rectification, smoothing and stabilisation

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