Calculate the current in a 140-W electric blanket connected to a 120-V outlet.
2007-08-26 03:31:24 · 5 answers · asked by boy101 3 in Science & Mathematics ➔ Physics
P=140 w
v=120 v
P=VI
140=120(I)
140/120=I
CURRENT,i=1.17A
2007-08-26 05:44:30 · answer #1 · answered by missabycute 1 · 0⤊ 0⤋
Watts = voltage X current.
140 = 120 X current
current = 1.167 amps
2007-08-26 11:00:47 · answer #2 · answered by eric l 6 · 0⤊ 0⤋
I = P/V = 140/120
assuming power factor = 0
2007-08-26 11:08:06 · answer #3 · answered by andyg77 7 · 0⤊ 0⤋
W=V*I so I =W/V= 140/120 =1.17 amp
2007-08-26 10:37:46 · answer #4 · answered by santmann2002 7 · 0⤊ 0⤋
You have to base your calculation on the basic laws like:
V=RI and W=IV
So you want to know the current and you have the watt and the voltage so formula will be:
I=W/V > 140w//120v = 1.16amp
Next step for you is to look at your wire gage, is it enough big to carry your current ?
2007-08-26 10:40:13 · answer #5 · answered by Anonymous · 0⤊ 0⤋