All household circuits are wired in parallel. A 1150-W toaster, a 210-W blender,
ID: 1322324 • Letter: A
Question
All household circuits are wired in parallel. A 1150-W toaster, a 210-W blender, and a 55-W lamp are plugged into the same outlet. (The three devices are in parallel when plugged into the same outlet.) Assume that this is the standard household 120-V circuit with a 15-A fuse.
(a) What current is drawn by each device?
(b) To see if this combination will blow the 15-A fuse, find the total current used when all three appliances are on.
Itotal = ________ A
Itoaster = ______ A Iblender = _______ A Ilamp = _________ AExplanation / Answer
a)
Itoaster = P/V
= 1150/120
= 9.58 A
Iblender = P/V
= 210/120
= 1.75 A
Ilamp = P/V
= 55/120
= 0.458 A
b) Itotal = 9.58 + 1.75 + 0.458
= 11.79 A
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