An electric heating element is connected to a 110 V circuit and a current of 3.2 A is flowing through the element. How much energy is used up during a period of 5 hours by the element? A. 550 Wh B. 352 Wh C. 1,760 Wh D. 2,580 Wh
E = IVt
Where E is the energy is J
I is the current
V is the voltage
t is time in seconds.
I = 3.2A V = 110 V, t = 5 hours.
Since the options are in Wh we would leave the time in hours, and Current Voltage has a unit of Watts.
E = (3.2 A 110 V) 5 hours
E = 352 Watts 5 hours
E = 1760 Wattshours
E = 1760 Wh
Option C.