By mistake a voltmeter is connected in series an an ammeter is connected in parallel with a resistance in an electrical circuit. What will happen to the instrument?

Options

A. Voltmeter is damaged
B. Ammeter is damaged
C. Both are damaged
D. None is damaged

Explanation

To analyze the situation where a voltmeter is mistakenly connected in series and an ammeter is connected in parallel with a resistance in an electrical circuit, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Function of Each Instrument**:
- A **voltmeter** is designed to measure the potential difference (voltage) across components and is typically connected in parallel because it has a high internal resistance.
- An **ammeter** measures the current flowing through a circuit and is connected in series because it has a low internal resistance.

2. **Identify the Mistake**:
- In this scenario, the voltmeter is connected in series with the circuit, and the ammeter is connected in parallel with the resistance. This is the opposite of their intended connections.

3. **Effect of Connecting the Voltmeter in Series**:
- Since the voltmeter has a high resistance, connecting it in series increases the total resistance of the circuit. This leads to a decrease in the overall current flowing through the circuit according to Ohm's Law (V = IR).

4. **Effect of Connecting the Ammeter in Parallel**:
- The ammeter, which has a low resistance, is connected in parallel with the resistance. This means that it will measure the current flowing through the parallel branch. However, since the total current in the circuit has decreased due to the high resistance of the voltmeter, the current through the ammeter will also be low.

5. **Determine the Impact on the Instruments**:
- Because the current flowing through the circuit is reduced, neither the voltmeter nor the ammeter will experience excessive current that could damage them. The voltmeter will not be damaged because it is not subjected to high current, and the ammeter will not be damaged for the same reason.

6. **Conclusion**:
- Therefore, neither the voltmeter nor the ammeter will be damaged due to this incorrect connection. The correct answer to the question is that both instruments remain undamaged.

### Final Answer:
Neither the voltmeter nor the ammeter will be damaged.

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