Electromagnetic Induction

Ohm's law is true for metallic conductors only. According to this law, if there is no change in the physical state of a conductor (such as temperature)

then the ratio of the potential difference applied at its ends and the current flowing through it is a constant. If a graph be drawn between the applied potential difference and the current flowing through the conductor then it will be a straight line. Ohm's law is true for metallic conductors only. Hence, electrolytes, discharge tubes and vacuum tubes do not obey Ohm's law.

Drift velocity is given by As or so,

Conductance is inverse of resistance. Conductance is given by Substituting , we get If constant, then we have Substituting , we get Therefore, conductance will be halved.

At temperature of inversion E is minimum, ie, E = 0 or