In half wave rectification, if the input frequency is 60 Hz, then the output frequency would be:

Concept:

A rectifier is a circuit that converts the AC signal at its input to pulsating DC at its output.
Rectifiers are further classified into two types depending upon the output they produce:

1. Full-wave and

2. Half-wave rectifiers

For the half-wave rectifier, the output is present is only for one half of the input signal and clipped for the other half.

Positive half-wave rectifier clips the negative half of the input signal and only a positive part of the input signal is present.

Negative half-wave rectifier clips the positive half of the input signal and only negative part of the input signal is present.

Calculation:

In case of half wave rectification,

Input frequency = Output Frequency

Since Input Frequency = 60 Hz

Therefore Output Frequency = 60 Hz

Hence, option (4) is the correct answer.