Capacitors in series
What is the equivalent capacitance of two 2 μF capacitors connected in series?
Answer B: explanation for every choice
A
This is one quarter of a single capacitor's value.
B
Correct. 1/C = 1/2 + 1/2 = 1, so C = 1 μF.
C
This assumes connecting in series doesn't change the capacitance.
D
4 μF is the parallel combination.
TakeawayCapacitors combine opposite to resistors: series uses reciprocals, parallel adds.
Equation usedCapacitance and stored energy
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