Question

For the figure given below, find the effective potential difference when the batteries are connected in series.

• A. 20 volts
• B. 24 volts
• C. 26 volts
• D. 25 volts

Answer 1

The correct option is D

25 volts

In the circuit diagram, the cells are connected in series.
In a series combination of cells, the total potential difference is the sum of potential differences of all the individual cells.
Effective potential difference $=V_1+V_2+V_3+V_4+V_5$
Effective potential difference = 5V +7V +8V +4.2V +0.8V = 25V