Which is correct statement

Options

A. A voltmeter should have small resistance
B. A voltmeter should have large resistance
C. A voltmeter should have small resistance
D. An ammeter should have large resistance

Answer

To determine which statement is correct regarding voltmeters and ammeters, we need to analyze the function and characteristics of each device.

### Step-by-Step Solution:

1. **Understanding the Function of a Voltmeter**:
- A voltmeter is used to measure the potential difference (voltage) between two points in a circuit.
- It is connected in parallel with the component across which the voltage is to be measured.

**Hint**: Remember that voltmeters measure voltage and are connected in parallel.

2. **Resistance of a Voltmeter**:
- An ideal voltmeter has a very high resistance. This is crucial because if the voltmeter has low resistance, it would draw current from the circuit, affecting the voltage reading.
- The goal is to ensure that the current flowing through the voltmeter (I1) is approximately zero, which means it should not affect the circuit.

**Hint**: High resistance in a voltmeter prevents it from drawing significant current.

3. **Understanding the Function of an Ammeter**:
- An ammeter measures the current flowing through a circuit.
- It is connected in series with the component whose current is to be measured.

**Hint**: Remember that ammeters measure current and are connected in series.

4. **Resistance of an Ammeter**:
- An ideal ammeter has very low resistance. This is necessary so that it does not impede the flow of current in the circuit.
- If the resistance of the ammeter is high, it would limit the current flow, leading to an inaccurate reading.

**Hint**: Low resistance in an ammeter allows for accurate current measurement without affecting the circuit.

5. **Conclusion**:
- Based on the characteristics discussed:
- The voltmeter should have high resistance (to avoid drawing current).
- The ammeter should have low resistance (to allow current to flow freely).
- Therefore, the correct statement is that the voltmeter has high resistance and the ammeter has low resistance.

### Final Answer:
The correct statement is that a voltmeter has high resistance and an ammeter has low resistance.