shresthasharda4 shresthasharda4

14-06-2021
Physics

contestada

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

Respuesta :

VestaHofman VestaHofman

14-06-2021

Answer:

1210 ohm

Explanation:

Given :

P=40 W

V=220 V

Now,

[tex]P=\frac{V^{2} }{R} \\40=\frac{(220)^{2} }{R} \\40R=48400\\R=\frac{48400}{40} \\R=1210 ohm[/tex]

Therefore, resistance of bulb will be 1210 ohm

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