Question

What is limitation of ohm's law ? What is drift velocity ?

Answer 1

Dear Student,


​​​​​​Limitations of ohm's law are:

• Ohm's law is applicable for a constant temperature,that is if temperature changes,ohm's law is not valid.
• Not applicable on non-metallic conductors.
• Not applicable for non-linear devices like diodes etc.

When a potential difference is applied across a conductor,then an electric field is established due to which every free electron acquires a definite velocity in a particular direction, this is known as drift velocity.

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