An electric kettle is rated at and is used to boil water for exactly
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
An electric kettle is rated at 1.50×103W and is used to boil water for exactly 3.0min. The local cost of electrical energy is 0.12dollars/kWh. The household supply voltage is 120V and may be treated as constant.
(a) Calculate the total electrical energy consumed by the kettle during the 3.0min interval. Express your answer in joules.
(b) Convert the energy found in part (a) to kilowatt-hours and determine the cost of operating the kettle for this time.
(c) Determine the electric current drawn by the kettle from the 120V outlet during operation.