Question
Question: If \(R_{1}\) and \(R_{2}\) are respectively the filament resistances of a 200 watt bulb and 100 watt...
If R1 and R2 are respectively the filament resistances of a 200 watt bulb and 100 watt bulb designed to operate on the same voltage, then
A
R1 is two times R2
B
R2 is two times R1
C
R2 is four times R1
D
R1 is four times R2
Answer
R2 is two times R1
Explanation
Solution
P∝R1⇒P2P1=R1R2 ⇒100200=R1R2⇒R2=2R1