E.M.F. of a cell is expressed in

Options

A. volt
B. volt per metre
C. volt metre
D. none of these

Explanation

To determine the unit in which the electromotive force (E.M.F.) of a cell is expressed, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding E.M.F.**:
- E.M.F. stands for electromotive force. It represents the potential difference between the terminals of a cell when no current is flowing.

2. **Identifying the Unit of Potential Difference**:
- The unit of potential difference (voltage) is a fundamental concept in electricity. The standard unit for measuring potential difference is the Volt (V).

3. **Analyzing the Options**:
- The question provides several options:
- Volt
- Volt per meter
- Volt meter
- None of these
- We need to identify which of these options correctly represents the unit of E.M.F.

4. **Evaluating Each Option**:
- **Volt**: This is the correct unit for measuring potential difference and, hence, E.M.F.
- **Volt per meter**: This is a unit of electric field strength, not E.M.F.
- **Volt meter**: This refers to an instrument used to measure voltage, not a unit of E.M.F.
- **None of these**: This option is incorrect since we have already identified that E.M.F. is expressed in Volts.

5. **Conclusion**:
- Based on the analysis, the E.M.F. of a cell is expressed in **Volts**.

### Final Answer:
The E.M.F. of a cell is expressed in **Volts**.

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