K.C.S.E Physics Q & A - MODEL 2013PP2QN16

K.C.S.E Physics Q & A - MODEL 2013PP2QN16

​(a) Two points A and B have a potential difference of V volts. Q coulombs of charge flow between A and B for t seconds. Determine:
(i) the electrical energy transformed between the two points in terms of Q. 
(ii) the power transformed in terms of Q and t. 
(iii) show that the power transformed is given by P = IV.

​(b) The lighting circuit in a house has 20 lamps each rated 60 W, 240 V. Determine whether a fuse rated 4 A can be used in the circuit when all the lamps are put on.

answers