Question

How many 1.5 V cells will be required to make a battery of 12 V ?

• A. 4
• B. 6
• C. 8
• D. 10

Answer 1

The correct option is C

8

1. We know that a battery is a group of cells joined in series .
2. In order to make a battery of 12 V with each cell 1.5 V ,
   $$\begin{gathered} \mathrm{number}\mathrm{of}\mathrm{cell}\times \mathrm{voltage}\mathrm{of}\mathrm{single}\mathrm{cell}=\mathrm{Battery}\mathrm{voltage} \\ \mathrm{number}\mathrm{of}\mathrm{cell}=\frac{\mathrm{battery}\mathrm{voltage}}{\mathrm{voltage}\mathrm{of}\mathrm{single}\mathrm{cell}}=\frac{12}{1.5} \\ \mathrm{number}\mathrm{of}\mathrm{cells}=8 \end{gathered}$$

Hence 8x1.5 V cells are required to make a battery of 12V

Hence, option (c) is the correct answer.