1.
Bridge Rectifier is a type of Full Wave Rectifier that uses ____________ diodes to form a closed-loop bridge.
A
2
B
6
C
4
D
8
View Answer
Correct Answer: C — 4
Explanation:
The correct answer is C: 4.
A bridge rectifier is a full-wave rectifier that converts AC input to DC output using four diodes arranged in a bridge configuration.
Working Principle:
- Positive half-cycle: Diodes D1 and D2 conduct; D3 and D4 are in reverse bias.
- Negative half-cycle: Diodes D3 and D4 conduct; D1 and D2 are in reverse bias.
- Current always flows in the same direction through the load, producing unidirectional DC output.
Advantages:
- Utilizes both halves of the AC waveform (full-wave rectification).
- Higher output voltage and power than half-wave rectifiers.
- Lower ripple frequency, easier to filter.
Disadvantages:
- Two diodes always in the conducting path cause a voltage drop of ~1.4V (2 × 0.7V).
- Requires four diodes vs. one in a half-wave rectifier.
Applications: Power supply circuits, battery chargers, and AC-to-DC conversion in electronic equipment.