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# Batteries in Series and Parallel

Batteries are the power suppliers in any circuit. These battery are connect to each other to match our  desired voltage.There are three ways to connect the circuit either in series, parallel or both.Lets learn what will happen if it is done so.

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## Batteries in Series

Batteries connected in series have negative terminal of one cell connected to positive terminal of another and vice verse as shown in figure. By connecting these cells in series the total voltage is increased whereas the capacity of each remains the same.

Here there are four cells connected in series of 1.5 V. Since cells are connected in series the total voltage is 1.5 V + 1.5 V + 1.5 V + 1.5 V = 6 V. But the capacity does not vary. If v1,v2,v3.....vn are the voltages applied in the series then the total voltage is given by
v = v1 + v2 + v3 + ..... + vn.

## Batteries in Parallel

Batteries connected in parallel are quite contrary to the series circuit. They have positive terminal connected to the positive terminal of the other and the negative terminal of one end of the battery connected to negative terminal of another cell.

In the above figure the batteries are said to be connected in parallel because positive terminal of one cell is connected to positive terminal of another. There are two batteries of V . Since cells are connected in series the overall voltage will be 3 V. But how ever the over all capacity will be equal to that of capacity of one cell.If v1,v2,v3.....vn are the voltages applied in the series then the total voltage is given by
$\frac{1}{v}$ = $\frac{1}{v_1}$ + $\frac{1}{v_2}$ + $\frac{1}{v_3}$ + ..... + $\frac{1}{v_n}$.