Question

What is the resistance of a bulb of 4ow
connected in a line of 220v?
2​

Answer 1

1210 ohm

Step-by-step explanation:

Given :

P=40 W

V=220 V

Now,

`P=(V^(2) )/(R) \\40=((220)^(2) )/(R) \\40R=48400\\R=(48400)/(40) \\R=1210 ohm`

Therefore, resistance of bulb will be 1210 ohm