A Heater Uses 20 a When Used in a 110-V

question 15

Multiple Choice

A heater uses 20 A when used in a 110-V line.If electric power costs 10 cents per kilowatt hour,the cost of running the heater for 10 hours is

• A)$0.22.
• B)$0.55.
• C)$2.20.
• D)$5.50.
• E)none of these