A non-ohmic device does not obey Ohm’s Law (V ∝ I), meaning its resistance changes with voltage or current. Therefore, its voltage-current (V–I) graph is non-linear, i.e., not a straight line.
The voltage current graph of a non-ohmic device is:
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Question context
This question is part of ⚡ Electrical Engineering within the broader 🛠️ Engineering Essentials subject and appears in the Engineering College Admission Test (ECAT) preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.