Question

campare the Rasistance of two bulbs of 50 watt and 200 watt if they are at the same valtage.

Answer 1

Answer:↪Since we know that,

↪Power = I^2 R or , Power = V^2/R

↪Since here , we have the same voltage here we get as ,

↪For Bulb A let the , Resistance be R1 and for the Bulb B let the Resistance be R2

↪so we get as ,

↪50 = V^2 / R1 _____(1)

↪and 200 = V^2 /R2 _____(2)

↪since voltage is same , we can equate equation (1) & (2)

↪so here ,

↪R1 ( 50) = R2 ( 200)

↪so ==》 R1/R2 = 200/50

〽R1/R2 = 4

↪so we get as the ratio ,

⭐R1:R2 = 4:1