a. A technician transfers three separate charges between the terminals of a battery as follows:
(i) 0.40 C through a potential difference of 12 V
(ii) 0.25 C through a potential difference of 15 V
(iii) 0.35 C through a potential difference of 9 V
Calculate the total work done.
b. Determine the percentage of the total work contributed by the second transfer.