NEET2021Physics-Alternating Current
NEET 2021 Physics LCR Circuits MCQ Question
Type: MCQ-numerical-Medium-Class 12
A series LCR circuit containing 5.0 H inductor, 80 μF capacitor and 40 Ω resistor is connected to 230 V variable frequency ac source. The angular frequencies of the source at which power transferred to the circuit is half the power at the resonant angular frequency are likely to be:
A
25 rad/s and 75 rad/s
B
50 rad/s and 25 rad/s
C
46 rad/s and 54 rad/s
D
42 rad/s and 58 rad/s
Correct Answer
Option C
Detailed Explanation
The power transferred is half at frequencies ω₁ and ω₂ where ω₀² = ω₁ω₂. Calculating using the given L, C, and R values, the frequencies are approximately 42 rad/s and 58 rad/s.
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