Question

Please answer it is of ch Electricity NCRT

Answer 1

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When when he plot the ( V - I ) graph he got a straight line passing through origin because voltage is directly proportional to the electrical current. This is known as Ohm's law.

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Ohm's law states that the if the physical conditions are remain unchanged , the thethe potential difference across the two ends of a conductor is directly proportional to the electrical current flowing through it.

Mathematically ,

$\sf{\implies V \propto I }$

$\bf{\implies V = IR }$

where R is the constant of proportionality and is called the resistance of the conductor it is a property of a conductor to resist the flow of charge through it.

[ For various V - I graphs refer to the attachment :]