(a) Assume
P = 100 W
V = 220 V is the voltage.
We are aware of this.
P = V2 / R = Power
R = (220)2 / 100
484 ohm
(b) The current that may be safely carried through it is
P / V = I
I = 220 / 100
0.45 A = I
An electric bulb is rated at 220 V, 100 W. (a) What is its resistance? (b) What safe current can be passed through it?
An electric bulb is rated at 220 V, 100 W. (a) What is its resistance? (b) What safe current can be passed through it?