A resistance of 10 Ωcapacitance of 0.1μF and an inductance of 2mH are connected in series acrosssourceof alternating emf of variable frequency. At that frequency does maximum current flow?
A
11.25 kHz
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B
23.76 kHz
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C
35.46 kHz
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D
46.72 kHz
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Solution
The correct option is A11.25 kHz XL=Xc;Lω =1ωC f=12π1√LC=12π1√2×10−3×0.1×10−6 f=12π1√2×10−10=1052×3.14×1.414=11.25kHz