Statement A : The resistance of ideal ammeter is zero
Statement B : The resistance of ideal voltmeter is infinity
Choose the correct option among the following.

Options

A. Only A is correct
B. Only 'B' is correct
C. Both A and B are correct
D. Both A and B are false

Answer

To solve the question, we need to analyze both statements A and B regarding the characteristics of an ideal ammeter and an ideal voltmeter.

### Step 1: Analyze Statement A
- **Statement A**: The resistance of an ideal ammeter is zero.
- An ammeter is a device used to measure electric current. For accurate measurement, all the current flowing in the circuit must pass through the ammeter.
- If the ammeter has any resistance, it would impede the flow of current, leading to a lower reading than the actual current in the circuit.
- Therefore, to ensure that the ammeter does not affect the current it measures, an ideal ammeter is designed to have zero resistance.

**Conclusion for Statement A**: This statement is correct.

### Step 2: Analyze Statement B
- **Statement B**: The resistance of an ideal voltmeter is infinity.
- A voltmeter measures the potential difference between two points in a circuit. For accurate measurement, it should not draw any current from the circuit.
- If a voltmeter has any finite resistance, it will allow some current to flow through it, which would affect the circuit and lead to an inaccurate measurement of the potential difference.
- Therefore, to ensure that the voltmeter does not draw current and thus does not affect the circuit, an ideal voltmeter is designed to have infinite resistance.

**Conclusion for Statement B**: This statement is also correct.

### Final Conclusion
Both statements A and B are correct. Therefore, the correct option is **C**: Both statements are true.

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