Which person would have a higher bill from the electric comp

Which person would have a higher bill from the electric company. Assume the company only charges based on real power. Explain why that person will have the highest bill.

Solution

First, the time period of all signals are same and have same dc level. so time duration of all persons are same.

Now see the amplifudes of all signals, amplitude deflicts power. the power who has more amplitude has more power used. So power bill is also high for high amplitudes in the woveforms.

A has high amplitude. So, person A got highest power bill compare with B and C.