Final answer:
The correct answer is option b) 50 Hz, 100 Hz
Step-by-step explanation:
In the case of half-wave rectification, the output frequency is the same as the input frequency. This means that if the input frequency is 50 Hz, the output frequency will also be 50 Hz. On the other hand, full-wave rectification results in an output frequency that is twice the input frequency.
Therefore, for a 50 Hz input frequency, the output frequency of a full-wave rectifier will be 100 Hz. The correct answer to the student's question is therefore: b) 50 Hz, 100 Hz for half-wave and full-wave rectification, respectively.