Exam-style question
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What effect does increasing the inductance in an LC circuit have on its resonant frequency?.
- A.It increases the resonant frequency.
- B.It decreases the resonant frequency.
- C.It has no effect on the resonant frequency.
- D.It makes the circuit unstable.
Model answer
What a good answer should say
- It decreases the resonant frequency.
Explanation
Why this works
Increasing the inductance in an LC circuit lowers the resonant frequency, as indicated by the formula for resonant frequency, which is inversely proportional to the square root of inductance. This means that as inductance increases, the circuit becomes tuned to lower frequencies.
The implication is that adjusting inductance can be used to control the frequency response of the circuit. Therefore, the conclusion is that inductance plays a crucial role in tuning circuits for desired frequencies.
Common mistake
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