Sample 1Medium
A circuit diagram shows a 3 µF capacitor connected in series with a combination of a 2 µF and a 4 µF capacitor in parallel, between terminals A and B. What is the equivalent capacitance between A and B?
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The answer is B.
The parallel pair gives 2 + 4 = 6 µF. In series with 3 µF: 1/C = 1/3 + 1/6 = 1/2, so C = 2 µF.
- A.
9 µF adds all three as if in parallel.
- C.
1.33 µF treats the 2 µF and 4 µF as in series too.
- D.
6 µF is only the parallel pair; it leaves out the 3 µF in series.
NCERT: Class 12 Physics, Chapter 2