Question

if an electric bulb connected to 220 volt line drawn an electric current of 0.5 ampere then what will be the resistance of filament of a bulb

Answer 1

Given :

Voltage ( V ) = 220 v

Current ( I ) = 0.5 A

By Ohm's Law :

V = I R

==> R = V / I

= 220 v / O.5 A

= 220 v / 1 / 2 A

= 220 v × 2 A

= 440 Ω

Answer :

The resistance is 440 Ω

Hope it helps !

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Answer 2

We know the general formula,

V= IR where, V is the potential difference

                      I is the current flowing through circuit

                      R is the Resistance provided by circuit.

therefore, finding R,

R= $\frac{V}{I}$

R= $\frac{220}{0.5}$

R = 440 Ohm.