Questions
E denotes electric field in a uniform conductor, I corresponding current through it, vd drift velocity of electrons and P denotes thermal power produced in the conductor, then which of the following graph is incorrect?
detailed solution
Correct option is C
E=IRL = I.ρA = neAvdρA ⇒ vd ∝ E Straight lineP=I2R = EAρ2 R ⇒P ∝ E2 Symmetric parabolaAlso P ∝ I2 parabolaHence, all graphs 1, 2, 4 are correct and 3 is incorrect.Talk to our academic expert!
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A potential difference is applied across the ends of a metallic wire. If the potential difference doubled, the drift velocity
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