When either L or C is increased ,the resonant frequency of the RLC series circuit :
Correct answer: B. Decreases
- A. Increases
- B. Decreases
- C. Remains same
- D. Becomes zero
Explanation
The resonant frequency of an RLC series circuit is:fo=1/2pisqrt {LC}Here, is inductance and is capacitance.If L increases, the denominator becomes larger → thefrequency becomes smaller.If C increases, the denominator also becomes larger → thefrequency again decreases.So, increasing either or reduces the resonant frequency.
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