Question

calculate the resistance of a bulb rated 100w,250v

Answer 1

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Answer 2

Answer:

625 Ω is the resistance of a bulb rated 100w,250v

Explanation:

Voltage rating on bulb = V = 250 Volts

Power rating on the bulb = 100 Watts

Resistance of  the bulb:

$R=\frac{V^2}{W}=\frac{250 V\times 250 V}{100W}=625\Omega$

625 Ω is the resistance of a bulb rated 100w ,250v.