Three identical cells, each of emf 2V and internal resistance 0.2 ohm, are connected in series to an external resistor of 7.4 ohm. Calculate the current in the circuit and the terminal potential difference across an equivalent.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Calculate the equivalent EMF of the cells
Since the three cells are connected in series, the equivalent EMF (E_eq) is the sum of the individual EMFs of each cell.

\[ E_{eq} = E_1 + E_2 + E_3 = 2V + 2V + 2V = 6V \]
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