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The following table gives the length of three copper wires, their diameters, and the applied potential difference across their ends. Arrange the wires in increasing order according to the following:(a) The magnitude of the electric field within them,(b) The drift speed of electrons through them, and(c) The current density within them.Wire no.LengthDiameterPotential Difference1.L3dV2.2LdV3.3L2d2V |
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Answer» (i) E1 = V/L, E2 = V/2L, E3 = 2V/3L E2 < E3 < E1 (ii) Vd α E Vd2 < Vd3 < Vd1 (iii) I = nAe Vd / J= σE J = n e Vd J2 < J3<J1 |
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