Question

An electric bulb marked 500W, 250V is connected to a 250V supply. a) Find the current trough the circuit ? b) Calculate the resistance of the bulb ?​

Answer 1

Answer:

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Explanation:

Given,

The power rating of the electric bulb, P=500 W

Voltage, V=250 V

i) We know,

P=VI

⟹I=

V

P

I=

250

500

I=2 A

ii) V=IR

⟹R=

I

V

R=

2

250

R=125 Ω