In a half wave rectifier circuit operating from 50 Hz mains frequency, the fundamental frequency in the ripple would be

Options

A. 25 Hz
B. 50 Hz
C. 70.7 Hz
D. 100 Hz

Explanation

To solve the problem of determining the fundamental frequency in the ripple of a half-wave rectifier circuit operating from a 50 Hz mains frequency, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Input Frequency**:
The input frequency of the AC mains is given as 50 Hz. This means that the AC voltage completes 50 cycles in one second.

2. **Identify the Function of a Half-Wave Rectifier**:
A half-wave rectifier allows only one half (either positive or negative) of the AC waveform to pass through while blocking the other half. In this case, it typically allows the positive half of the AC waveform to pass.

3. **Analyze the Output Waveform**:
Since the half-wave rectifier only allows one half of the waveform to pass, the output will consist of a series of pulses corresponding to the positive half-cycles of the input AC signal. The negative half-cycles are clipped off.

4. **Determine the Ripple Frequency**:
The output ripple frequency is determined by the frequency of the input AC signal. Since the half-wave rectifier only passes one half of the AC cycle, the frequency of the output ripple will still be the same as the input frequency. Therefore, the ripple frequency will also be 50 Hz.

5. **Conclude the Fundamental Frequency in Ripple**:
Since the ripple frequency is the same as the input frequency, we conclude that the fundamental frequency in the ripple of the half-wave rectifier circuit is 50 Hz.

### Final Answer:
The fundamental frequency in the ripple would be **50 Hz**.

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