Question

In a series circuit using a series of cells (battery), how could the total voltage be increased?

Answer 1

A. Add another series of cells in parallel to the first battery.
B. Add another series of cells in series with the first battery.
C. Remove some of the cells from the battery and place them in parallel.
D. Add a resistor to the circuit in series with the battery.

Answer 2

A

Answer 3

btw isn't this in wrong section(Mathematics)?