Question

two bulbs of 500w and 200 rated at 250;v will have resistance ratio as​

Answer 1

Answer:

Let power and resistance of first bulb be P1 and R1 respectively also take the same for bulb2

Explanation:

Calculate the resistance of each bulb

R1=V×V/P1

=250×250/500

=125 ohm

R2=V×V/P2

=250×250/200

=312.5

R1/R2 = 125/312.5

= 0.4

=4/10

=2/5

Ans:. 2:5