combination of capacitors hard

Question

Two capacitors C and 2C in series net capacitance is:

RankGuru · Accepted Answer

For capacitors in **series**, the reciprocal of the equivalent capacitance is the sum of the reciprocals of individual capacitances:
$\frac{1}{C_{eq}} = \frac{1}{C_1} + \frac{1}{C_2}$
$\frac{1}{C_{eq}} = \frac{1}{C} + \frac{1}{2C} = \frac{2+1}{2C} = \frac{3}{2C}$
$C_{eq} = \frac{2C}{3}$.
Note: In series, the total capacitance is always less than the smallest individual capacitance.

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combination of capacitors hard

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