What is the equivalent capacitance when three capacitors of 3 microfarads each are connected in series?
A. 9 microfarads
B. 1 microfarad
C. 0.33 microfarads
D. 3 microfarads
Answer: Option B
Solution (By JKExamLibrary)
The formula for capacitors in series is exactly the opposite of resistors. 1/C_eq = 1/C1 + 1/C2 + 1/C3. Here, all are 3 uF. So, 1/C_eq = 1/3 + 1/3 + 1/3 = 3/3 = 1. Therefore, C_eq = 1 microfarad. When identical capacitors are in series, you simply divide the capacitance by the number of capacitors (3/3 = 1).
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