A water pump draws about 3.7 A when connected to 220 V.What is the cost (with electrical energy at 6.0 cents per kWh)of running the pump for 7.0 h?
A)2.5 cents
B)9.0 cents
C)34 cents
D)68 cents
E)26 cents

Question

Quizplus · Accepted Answer

Power (P) = VI
= 220 V × 3.7 A
= 814 W

Energy consumed (E) = Pt
= 814 W × 7.0 h
= 5698 Wh
= 5.698 kWh

Cost of energy = Energy consumed × Cost per kWh
= 5.698 kWh × 6.0 cents/kWh
= 34.188 cents
≈ 34 cents

Therefore, the cost of running the pump for 7.0 hours is approximately 34 cents.

A Water Pump Draws About 3