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Ohm's law is true

1. For metallic conductors at low temperature
2. For metallic conductors at high temperature
3. For electrolytes when current passes through them
4. For diode when current flows

Correct answer: For metallic conductors at low temperature

Solution

Ohm's law is obeyed by metallic conductors when physical conditions such as temperature remain constant, especially at low temperature where resistance is nearly constant. It is not generally valid for electrolytes or diodes.

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