Question

Derive the relationship between current and potential difference​

Answer 1

Answer:

As more charges carrying electrical energy passes through the conductor per unit time, more electrical energy is dissipated. Hence, the potential difference, V across the conductor increases with the current, I that flows through it. ... The gradient or the ratio of V/I is constant as current increases

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Answer 2

Answer:

Current density is a vector quantity if potential differences velocity is applied across a conductor of length l and area of cross section