Calculate the amount of heat generated in an external load of resistance 8Ω if an alternating current of peak value 5A is passed through for 100s.
A
20,000J
B
10,000J
C
5,000J
D
4,000J
E
200J
Verified Correct Answer: B.
Physical Principles & Numerical Solution
E = I\(_{rms}\)\(^2\)Rt
I\(_{rms}\) = \(\frac{I_o}{\sqrt{2}}\) = \(\frac{5}{\sqrt{2}}\) = 3.5355
E = 12.5 x 8 x 100 = 10,000J
Source: WAEC / JAMB / NECO Classroom Archive (Record #25249)