Electronics - Resistance and Power - Discussion
Discussion Forum : Resistance and Power - General Questions (Q.No. 31)
31.
How many amps are used by a 100 watt, 120 volt light bulb?
Discussion:
5 comments Page 1 of 1.
Ashish said:
7 years ago
W=100 watt
V=120 volt
I= ?
Ans: R=v^2/w.
=(120*120)/100,
=144 ohm.
I= V/R.
=120/144.
I= 0.83A.
I=830mA.
V=120 volt
I= ?
Ans: R=v^2/w.
=(120*120)/100,
=144 ohm.
I= V/R.
=120/144.
I= 0.83A.
I=830mA.
(1)
Anesh said:
1 decade ago
R=V square/p.
R=120 squre/100
R=144 ohms.
I=V/R.
I= 120/144=830mA
R=120 squre/100
R=144 ohms.
I=V/R.
I= 120/144=830mA
S.THANGARAJ said:
1 decade ago
W=VI
I=W/V
I=100/120=830mA
I=W/V
I=100/120=830mA
Joe Rini said:
9 years ago
W = VI.
100 = 120*I.
I = 100/120.
100 = 120*I.
I = 100/120.
Prasanth kumar said:
9 years ago
P = VI so I = P/V,
I = 100/120 = 0.83.
So, 0.83 * (1000/1000) = 830 * 10^-3 = 830mA.
I = 100/120 = 0.83.
So, 0.83 * (1000/1000) = 830 * 10^-3 = 830mA.
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