Physics
WAEC 1999
Using the diagram above, calculate the effective capacitance of the circuit
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A.
1.56μf
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B.
3.00μF
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C.
3.71μF
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D.
9.00μF
Correct Answer: Option A
Explanation
\(C_1\) = 3μF + 4μF = 7μF ( capacitance in parallel )
\(\frac{1}{ C} = \frac{ 1}{2} + \frac{1}{7} = \frac{ 7 + 2 }{14} = \frac{9}{14}\)
∴ C = \(\frac{14}{9}\) = 1.56μF
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