A) electrolytes
B) discharge tubes
C) vacuum tubes
D) all of these
Correct Answer: D
Solution :
Key Idea: Ohm's law is true for metallic conductors only. According to this law, if there is no change in the physical state of a conductor (such as temperature) then the ratio of the potential difference applied at its ends and the current flowing through it is a constant. If a graph be drawn between the applied potential difference V and the current \[i\] flowing through the conductor then it will be a straight line. Ohm's law is true for metallic conductors only. Hence, electrolytes, discharge tubes and vacuum tubes do not obey Ohm's law.You need to login to perform this action.
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