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B
Transistor
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C
Electrolyte
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D
Conductor
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Solution
The correct option is D Conductor Ohm's law is applicable for conductors only.
Resistance of a conductor is directly proportional to its length. That is, when the length of conductor is tripled, its resistance also gets tripled. ... Explanation: According to the Ohm's law, it is applicable only to conductors. Hence, Ohm's law is not applicable in case of insulators.