Question

a battery consists of five dry cells connected in series. if the voltage developed by each cell is 1.5 v, the total voltage developed by the battery is
a) 5.0 v.
b) 7.5 v.

Explanation:

Step1: Recall series voltage rule

In series, total voltage $V_{total}$ is sum of individual voltages. For $n$ identical cells, $V_{total}=n\times V_{cell}$.

Step2: Substitute values

Here, $n = 5$, $V_{cell}=1.5\ V$. So $V_{total}=5\times1.5 = 7.5\ V$.

Answer:

B) 7.5 V.