Question

define resistance also give the graphical representations.

Answer 1

Hello.. Here is your answer

Resistance is a device that opposes the flow of current or you can say that it slows down the current flow in a circuit.

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Answer 2

The electrical resistance of a circuit is defined as the ratio of the voltage applied to the electric current which flows through it.
If resistance is constant over a considerable range then Ohm's law, i.e., V= IR can be used to predict the behaviour of the metal .