A cell of emf 'E' and internal resistance 'r' draws a current 'I'. Write the relation between terminal voltage 'V' in terms of E, I and r.

Explanation

To find the relation between the terminal voltage \( V \), the electromotive force (emf) \( E \), the current \( I \), and the internal resistance \( r \) of a cell, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Definitions**:
- The **emf** \( E \) of a cell is the maximum potential difference when no current is flowing.
- The **terminal voltage** \( V \) is the potential difference across the terminals of the cell when current is flowing.

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