UPSC NDA 2 2019 General Ability Solved Paper

Question : 54 of 150

Marks: +1, -0

Which one of the following statements regarding Ohm’slaw is not correct?

[NDA II 2019]

Ohm’s law is an assumption that current through a conductor is always directly proportional to the potential difference applied to it.
A conducting device obeys Ohm’s law when the resistance of a device is independent of magnitude and polarity of applied potential difference.
A conducting material obeys Ohm’s law when the resistance of material is independent of the magnitude and direction of applied electric field.
All homogeneous materials obey Ohm’s law irrespective of whether the field is within range of strong.

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