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A current passes through a wire of non uniform cross section. which of the following quantities are independent of the cross section?(a) charge crossing in a given time interval(b) drift speed(c) current density(d) free electron densityalso give the reason as to why each option is right or wrong.
Its is independent of free electron density.because we know that J = I /A = neVdWhere J = current density,A = cross section arean = no. of electronse = charge of electronsne = charge crossing in a given time intervalVd = drift velocityThanks & Regards,Nirmal SinghAskiitians Faculty
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