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 determine 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. **Understanding the Input Frequency**:
The circuit operates at a mains frequency of 50 Hz. This means that the alternating current (AC) input voltage completes one full cycle every 1/50 seconds.

2. **Half Wave Rectification**:
A half wave rectifier allows only one half (positive or negative) of the AC waveform to pass through. In this case, it typically allows the positive half of the AC signal to pass and blocks the negative half.

3. **Output Frequency Analysis**:
Since the half wave rectifier only allows one half of the AC cycle to pass, it effectively produces an output that has a frequency equal to the input frequency. Therefore, for every cycle of the AC input (50 Hz), there is one corresponding output cycle from the half wave rectifier.

4. **Ripple Frequency**:
The ripple frequency in the output of the half wave rectifier is the same as the frequency of the input AC signal. Thus, the fundamental frequency in the ripple of the output voltage will also be 50 Hz.

5. **Conclusion**:
Therefore, the fundamental frequency in the ripple of the output voltage for a half wave rectifier operating at 50 Hz mains frequency is 50 Hz.

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

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