A cell supplies a current of 2 A when it is connected to a 5` Omega ` resistance and supplies a current of 1.2 A, if it is connected to a resistance of 9 `Omega `. Find the e.m.f and internal resistance of the cell.

Explanation

To find the e.m.f (electromotive force) and internal resistance of the cell, we will use the given information about the currents and resistances.

### Step-by-Step Solution:

1. **Identify the Given Values:**
- Current \( I_1 = 2 \, \text{A} \) when connected to resistance \( R_1 = 5 \, \Omega \)
- Current \( I_2 = 1.2 \, \text{A} \) when connected to resistance \( R_2 = 9 \, \Omega \)

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