Exam-style question
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Which statement best describes non-ohmic behavior?.
- A.Resistance remains constant regardless of voltage.
- B.Current varies non-linearly with potential difference.
- C.Current is directly proportional to potential difference.
- D.Resistance increases with increasing temperature.
Model answer
What a good answer should say
- Current varies non-linearly with potential difference.
Explanation
Why this works
Non-ohmic behavior is defined by the fact that current does not vary linearly with potential difference, indicating that resistance changes with voltage. The key difference from ohmic conductors is that non-ohmic conductors, such as diodes and filament lamps, exhibit varying resistance under different conditions.
This applies in circuits where components do not follow Ohm's law, concluding that this behavior is essential for devices that require specific voltage-current characteristics.
Common mistake
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