Question

If r1 and r2 be the resistance of the filament of 40w and 60 w respectively operative 220 v then,

Answer 1

Answer:

Then?? what is your Question?

Explanation:

if u r looking for resistance R1 and R2 ,then

LET ASSUME , Filament is connected in Parallel as generally .

P = V2/R1

40 = (220)2/R1

R1 = 1210 ohm

similarly R2 = 806 ohm