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Question

A conducting material obeys ohm's law when

A
The resistivity of material is independent of it magnitude and direction of the applied electric field.
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B
The resistivity of material is dependent on the magnitude of the applied electric field
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C
When the resistance is dependent on the magnitude of the applied electric field
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D
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Solution

The correct option is A The resistivity of material is independent of it magnitude and direction of the applied electric field.
A conducting material obeys ohm's law when the resistivity of a material is independent of magnitude and direction of the applied electric field whereas a conducting device obeys ohm's law when the resistance of device is independent of the magnitude and the polarity of the applied potential difference.

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