State $Ohm's$ law. Calculate the resistance of a conductor, if the current flowing through it is $0.2 \,A$ when the applied potential difference is $0.8\, V$.
State $Ohm's$ law. Calculate the resistance of a conductor, if the current flowing through it is $0.2 \,A$ when the applied potential difference is $0.8\, V$.
It states that physical conditions remaining same the electric current flowing through a metallic conductor is directly proportional to the potential difference across its ends.
Given $I=0.2 A , V =0.8 V , R =?$
We have $R = V / I =0.8 / 0.2=4 ohm$
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