Hertz produced electromagnetic wave by using

Options

A. L C R circuit
B. C R circuit
C. L C circuit
D. none of the above

Explanation

To solve the question of how Hertz produced electromagnetic waves, we will analyze the options provided and determine which circuit was used.

### Step-by-Step Solution:

1. **Understanding Electromagnetic Waves**:
- Electromagnetic waves are produced due to the oscillation of electric charges, particularly electrons. When these charges oscillate, they create changing electric and magnetic fields, which propagate as electromagnetic waves.

2. **Identifying the Circuits**:
- The question provides four options: LCR circuit, CR circuit, LC circuit, and none of these.
- We need to evaluate each circuit type to see which one can produce electromagnetic waves.

3. **Evaluating the LCR Circuit**:
- An LCR circuit consists of an inductor (L), capacitor (C), and a resistor (R).
- The presence of the resistor introduces energy loss due to heat (power loss). This makes it inefficient for producing sustained oscillations necessary for generating electromagnetic waves.

4. **Evaluating the CR Circuit**:
- A CR circuit consists of a capacitor (C) and a resistor (R).
- Similar to the LCR circuit, the resistor causes energy loss, making it unsuitable for producing electromagnetic waves.

5. **Evaluating the LC Circuit**:
- An LC circuit consists of an inductor (L) and a capacitor (C) without any resistor.
- In this circuit, energy oscillates between the inductor and the capacitor without any loss (assuming ideal conditions). This oscillation can sustain the generation of electromagnetic waves.

6. **Conclusion**:
- Based on the analysis, the LC circuit is the most suitable circuit for producing electromagnetic waves, as it allows for continuous oscillation of energy without power loss.
- Therefore, the correct answer is **option C: LC circuit**.

### Final Answer:
Hertz produced electromagnetic waves using an **LC circuit**.

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