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The reactance offered by a capacitor to alternating current of frequency...

This question belongs to Electrical Engineering A.C Fundamentals, Circuits And Circuit Theory
A.C Fundamentals, Circuits and Circuit Theory
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The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 ohms. If frequency is increased to 100 Hz, reactance becomes __________ ohms.

Answer & Solution
Correct Answer: Option C
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জ্যোতির্ময় শাওন
জ্যোতির্ময় শাওন 6 years ago
Reactance of a capacitor is

XC=1/2πfC

Given that XC1 = 20Ω at 50 Hz

Then XC2 at 100 Hz will be

XC1 / XC2=(1/2πf1C)/(1 / 2πf2C)
by simplyfying you will get 10 .
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