How many pulses per cycle occur in single-phase half-wave rectification?

How many pulses per cycle occur in single-phase half-wave rectification?

• A. One
• B. Two
• C. Three
• D. Four

Answer: (A)

In single-phase half-wave rectification, only one half of the AC sine wave is allowed to pass. The diode conducts during the positive half-cycle and blocks during the negative half-cycle, producing a single current pulse per input cycle. The output remains near zero during the opposite half-cycle, so there aren’t two pulses in a cycle. If you ever see two pulses per cycle, that’s a feature of full-wave rectification on a single-phase source; three or four pulses per cycle involve multi-pulse or polyphase configurations, not a simple single-phase half-wave setup. Therefore, the number of pulses per cycle is one.

In single-phase half-wave rectification, only one half of the AC sine wave is allowed to pass. The diode conducts during the positive half-cycle and blocks during the negative half-cycle, producing a single current pulse per input cycle. The output remains near zero during the opposite half-cycle, so there aren’t two pulses in a cycle. If you ever see two pulses per cycle, that’s a feature of full-wave rectification on a single-phase source; three or four pulses per cycle involve multi-pulse or polyphase configurations, not a simple single-phase half-wave setup. Therefore, the number of pulses per cycle is one.