Exam-style question
Try this first
When would you expect to see ohmic behavior in a circuit?.
- A.In a circuit with a diode.
- B.In a circuit with a resistor at constant temperature.
- C.In a circuit with a filament lamp.
- D.In a circuit with a thermistor.
Model answer
What a good answer should say
- In a circuit with a resistor at constant temperature.
Explanation
Why this works
Ohmic behavior is defined as the condition where current is directly proportional to potential difference, which occurs in resistors at constant temperature. The key difference is that this behavior is consistent and predictable, unlike non-ohmic components where resistance can change.
This applies in standard circuit designs using resistors, concluding that resistors are ideal for applications requiring stable current-voltage relationships.
Common mistake
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