Question

What is limitation of ohms law?

Answer 1

Answer:

The limitation of ohms of law are explained

as followed:

This law cannot be applied to unilateral networks.

A unilateral networks has unilateral elements like diode , transistors, etc; which do not have same voltage current relation for both directions of current.

Answer 2

Limitation of ohm's law are as follows:

1. V is not always proportional to I (Figure. 3.5)
2. The relation between V and i depends on the sign of V.In other words if i is the current for a certain V, then reversing the direction of V keeping its magnitude fixed, does not produce a current of the same magnitude as i in the opposite direction.This happens, for example - diodes.(Figure. 3.6)
3. 3The relation between V and i is not unique that is there is more than one value of V for the same current i. for example- Galenium Arsenide(GaAs) (Figure. 3.7)

Source:NCERT

Hope it helps