A water pump draws about 3.8 A when connected to 240 V.What is the cost (with electrical energy at 9 cents per kWh)of running the pump for 10 h?
A)8.0 cents
B)15 cents
C)82 cents
D)95 cents

Question

Quizplus · Accepted Answer

1. Calculate the power consumption of the water pump using the formula P = V * I, where P is power in watts, V is voltage in volts, and I is current in amperes.
P = 240 V * 3.8 A = 912 watts
2. Calculate energy consumed by the water pump in kWh using the formula Energy = Power * Time / 1000, where Time is in hours.
Energy = 912 watts * 10 hours / 1000 = 9.12 kWh
3. Calculate the cost of electricity using the formula Cost = Energy * Rate, where Rate is the rate per kWh.
Cost = 9.12 kWh * $0.09/kWh = $0.82 or 82 cents (rounded to the nearest cent)

A Water Pump Draws About 3