Question

How many cells of 1.5 V will be needed to make a 9 V battery?

• A. 2
• B. 4
• C. 6
• D. 8

Answer 1

The correct option is C

6

Let the number of required cells be N. The total voltage is equal to 9 volt.
Therefore, $1.5\times N=9$
$N=\frac{9}{1.5}=6$
Hence 6 cells will be required.