Question
Question: An electric bulb of 100 W is designed to operate on 220 V. Resistance of the filament is...
An electric bulb of 100 W is designed to operate on 220 V. Resistance of the filament is
A
484 Ω
B
100 Ω
C
22000 Ω
D
242 Ω
Answer
484 Ω
Explanation
Solution
By using P=RV2⇒R=PV2=100(220)2=484ΩSSS