Exam-style question
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In which scenario would you observe non-ohmic behavior?.
- A.Using a standard resistor in a circuit.
- B.Using a diode in a circuit.
- C.Using a wire at constant temperature.
- D.Using a thermistor at constant temperature.
Model answer
What a good answer should say
- Using a diode in a circuit.
Explanation
Why this works
Non-ohmic behavior is characterized by the current not being directly proportional to the potential difference, which is observed in diodes. The key difference is that diodes allow current to flow in one direction only and exhibit a threshold voltage, unlike ohmic conductors where current flows freely.
This applies in circuits designed for rectification, concluding that diodes are essential for controlling current direction in electronic devices.
Common mistake
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