Ham Radio General Class Practice Test

What is the peak-inverse-voltage rating of a rectifier?

1. The maximum voltage the rectifier will handle in the conducting direction

2. 1.4 times the AC frequency

3. The maximum voltage the rectifier will handle in the non-conducting direction

4. 2.8 times the AC frequency

The correct answer is: The maximum voltage the rectifier will handle in the non-conducting direction

The peak-inverse-voltage (PIV) rating of a rectifier is defined as the maximum voltage that the rectifier can withstand in the reverse or non-conducting direction without breaking down. When a rectifier diode is in the conducting state, it allows current to flow, but in the off state (when it is reverse-biased), it must not let current flow unless the voltage exceeds its breakdown voltage. If the reverse voltage exceeds this PIV, it can cause damage to the diode, leading to failure. In typical applications, especially in power supply circuits, ensuring that the peak reverse voltage does not exceed the PIV rating of the rectifier is crucial for the reliability of the circuit. This is why the PIV is used as a specification to determine the rectifier's suitability for a given application, particularly in converting alternating current (AC) to direct current (DC). The other options do not accurately describe what PIV represents or are irrelevant to its definition. Understanding the concept of PIV helps in selecting the appropriate rectifier for various electrical applications, ensuring that components can handle the voltage conditions they will encounter during operation.