Problem 19.83 Energy use of home appliances. An 1900W toaster, a 1420W electric
ID: 1318794 • Letter: P
Question
Problem 19.83 Energy use of home appliances. An 1900W toaster, a 1420W electric frying pan, and a 60.0W lamp are plugged into the same electrical outlet in a 20.0A, 120 V circuit. (Note: When plugged into the same outlet, the three devices are in parallel with each other across the 120V outlet.) Part A What current is drawn by the toaster? toaster Submit My Answers Give Up Part B What current is drawn by the electric frying pan? I frying pan Submit My Answers Give Up Part C What current is drawn by the lamp? lamp Submit My Answers Give Up Part D previous l 10 of 13 l next 2:14 AM 2/25/2015Explanation / Answer
Make use of the relationship P=VI
The voltage across all elements in parallel here are equal, so the currents are...
Toaster: I = 1900/120 = 15.833 A Ans.
Electric Frying Pan : I = 1420/120 = 11.8333 A Ans.
Lamp: I = 60/120 = 0.50 A Ans.
Total current drawn = 15.833 + 11.833 + 0.50 = 28.16 A