Physics
WAEC 1997
A capacitor of capacitance 25µF is connected to an a.c power source of frequency 200/πHz. Calculate the reactance of the capacitor
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A.
0.01Ω
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B.
0.02Ω
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C.
50Ω
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D.
100Ω
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E.
150Ω
Correct Answer: Option D
Explanation
\(X_c=\frac{1}{2\pi{fc}}\)=\(\frac{1}{2\times\pi\times\frac{200}{\pi}\times 25\times 10^{-6}}=\frac{10^6}{10^4}\)=100 Ω
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