area = a = 20cm2 = 2 × 10–2m2
d = separation = 1mm = 10–3m
(b) Energy absorbed by battery during the process
= q × v = 1.06 × 10–10 C × 12 = 12.7 × 10–10J
(c) Before the process
(e) From (c) and (d) we have calculated, the energy loss by the separation of plates is equal to the work done by the man on plate. Hence no heat is produced in transformer.