Physics (AS & A Level) · May / June 2021 · Paper 11 · Question 33

A mobile phone battery is charged by connecting it to a constant potential difference of 5.0 V. After a time of 1.0 hour, the initial current of 0.50 A slowly decreases to zero, as shown. What is the best estimate of the energy transferred to the battery during the time of 2.0 hours shown in the graph?

1. A2700 J
2. B9000 J
3. C14 000 J
4. D18 000 J

As printed in the paper