CBSE Class 12 Physics 2023 Delhi Set 1 Paper

Question : 13

Total: 35

Which of the following statements about a series LCR circuit connected to an ac source is correct?

If the frequency of the source is increased, the impedance of the circuit first decreases and then increases.
If the net reactance (XL−XC) of circuit becomes equal to its resistance, then the current leads the voltage by 45∘.
At resonance, the voltage drop across the inductor is more than that across the capacitor.
At resonance, the voltage drop across the capacitor is more than that across the inductor.

Solution: 👈: Video Solution

Frequency vs. impedance graph of a series LCR circuit connected to an ac source is shown below:

It is clear from the graph that the impedance first decreases and then increases with increase of frequency.

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