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When two capacitors are connected in series and put on a $1 k v$ line, the energy stored in the system is $2 J$ . If the two capacitors are connected in parallel and put on the same mains, the energy stores is $9 J$ . Find the capacitance.
$24 μ F, 6 μ F$ .
$12 μ F, 6 μ F$ .
$12 μ F, 36 μ F$ .
$2 μ F, 36 μ F$ .

A

12 μ F, 36 μ F

.

B

24 μ F, 6 μ F

.

C

12 μ F, 6 μ F

.

D

2 μ F, 36 μ F

.

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