Which is correct statement

Options

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

Answer

To solve the question of which statement is correct regarding voltmeters and ammeters, we will analyze each statement step by step.

### Step-by-Step Solution:

1. **Understanding the Function of a Voltmeter:**
- A voltmeter is used to measure the voltage across a component in a circuit.
- For accurate voltage measurement, the voltmeter should not draw significant current from the circuit.

**Hint:** Remember that a voltmeter is connected in parallel with the component whose voltage is being measured.

2. **Resistance of a Voltmeter:**
- If a voltmeter has low resistance, it will draw more current, which can affect the voltage across the component being measured. This leads to an incorrect reading.
- Therefore, to ensure that the voltmeter does not affect the circuit, it should have a **large resistance**.

**Hint:** Think about how current flow affects voltage readings in a parallel circuit.

3. **Understanding the Function of an Ammeter:**
- An ammeter is used to measure the current flowing through a circuit.
- For accurate current measurement, the ammeter should not significantly alter the current in the circuit.

**Hint:** Recall that an ammeter is connected in series with the component whose current is being measured.

4. **Resistance of an Ammeter:**
- If an ammeter has high resistance, it will reduce the current flowing through the circuit, leading to an incorrect current reading.
- Therefore, to ensure that the ammeter does not affect the current it is measuring, it should have a **small resistance**.

**Hint:** Consider how adding resistance in series affects the total current in the circuit.

5. **Conclusion:**
- From the analysis:
- The correct statement regarding the voltmeter is that it should have **large resistance** (Statement B).
- The correct statement regarding the ammeter is that it should have **small resistance** (Statement C).
- Therefore, both Statement B and Statement C are correct.

### Final Answer:
- **Correct Statements:**
- B: A voltmeter should have large resistance.
- C: An ammeter should have small resistance.