Do not search from internet .....The resistance of hot filament of bulb is about 10 times the cold resistance .what will be the resistance of 100W-220V lamps ,when not in use.
Answers
Answered by
8
P= V²/R
R= V²/P
R= 220×220/100
R= 484ohm.
It is given resistance of hot lamp is 10 times the cold lamp.
Hence, R cold = 484/10 = 48.4 ohm ans..
HOPE IT HELPS..
Similar questions