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What are the limitatons of ohm.s law?...

What are the limitatons of ohm.s law?

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Ohm.s law fails if V -I graph is non-linear .
Ohm.s law fails if the relation between V and I depends on the sign of V .ex: - semi conductor diodes .
Ohm.s law fails if the relation between V and I is not - unique ex:-GaAs .
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  3. What are the limitatons of ohm.s law?

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