Question

Calculate the amount of heat generated while transferring 90000 coulombs of charge between the two terminals of a batterv of 40 V in one hour. Also determine the power expended in the process

Answer 1

Q = 90000 C, t = 1h = 3600 s, V = 40V
I =Q/t=90000/3600= 25 A
R =V/I=40/25= 1.6W
H = I²Rt = 25 × 25 × 1.6 × 3600= 3600 × 10³ J = 3600 kJ
P = I²R = 25 × 25 × 1.6= 1000 W = 1 KW