Question

How much current will an electric bulb draw from a 220V source,if the resistance of the bulb filament is 1200 ohm?

Answer 1

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Answer 2

For the electric bulb:

V = 220 V.

R = 1200 Ω.

Using Ohm's law,

V=IR

220 = I × 1200

220/1200 =I

I =0.183 A

For the heater:

R = 100 Ω.

V = 220 V.

Using Ohm's law,

V= IR

220= I×100

220/100= I

I

I =2.2A