Mark out the correct options
(i) An ammeter should have small resistance
(ii) An ammeter should have large resistance
(iii) A voltage should have small resistance
(iv) A voltage should have large resistance.

Options

A. (i),(ii)
B. (ii),(iii)
C. (iii),(iv)
D. (i),(iv)

Answer

To solve the question, we need to analyze each of the given statements regarding the characteristics of an ammeter and a voltmeter.

### Step-by-Step Solution:

1. **Understanding the Ammeter:**
- An ammeter is used to measure the current flowing through a circuit.
- It is connected in series with the circuit.
- If the ammeter has high resistance, it will impede the flow of current, leading to an inaccurate measurement.

**Conclusion:** An ammeter should have small resistance.
**Correct Option:** (i) An ammeter should have small resistance.

2. **Evaluating the Second Option:**
- Since we established that an ammeter should have low resistance to accurately measure current, the statement that an ammeter should have large resistance is incorrect.

**Conclusion:** An ammeter should NOT have large resistance.
**Correct Option:** (ii) An ammeter should have large resistance is incorrect.

3. **Understanding the Voltmeter:**
- A voltmeter is used to measure the voltage across two points in a circuit.
- It is connected in parallel with the component across which the voltage is to be measured.
- If the voltmeter has low resistance, it will draw current from the circuit, which can lead to an inaccurate voltage reading.

**Conclusion:** A voltmeter should have large resistance.
**Correct Option:** (iv) A voltmeter should have large resistance.

4. **Evaluating the Third Option:**
- Since we established that a voltmeter should have high resistance to avoid drawing current from the circuit, the statement that a voltmeter should have small resistance is incorrect.

**Conclusion:** A voltmeter should NOT have small resistance.
**Correct Option:** (iii) A voltmeter should have small resistance is incorrect.

### Final Answers:
- Correct Options: (i) and (iv)
- Incorrect Options: (ii) and (iii)