Question

Find the ratio of the resistance for two bulbs of 220V-60W and 110V-60W​

Answer 1

Answer:

220V-60W

resistance 1 = V²/P = 220²/60 = 48400/60 = 2420/3 ohm

110V-60W

resistance 2 = V²/P = 110²/60 = 12100/60 = 605/3ohm

resistance 1/resistance 2 = 2420/3 ÷ 605/3

= 2420/605 = 4

resistance 1: resistance 2 = 4:1

hope this will help you

Answer 2

Answer:

For the ratio of their resistance firstly calculate their resistance by this formula,

V1=220 ,. P1=60

V2=110 , P2 =60

the ratio between them is 4 : 1

hope it will help you.....