First slide

Capacitance

Question

In the arrangement shown, the equivalent capacitance between points A and B is

Moderate

A

4.5 µF
B

18 µF
C

2 µF
D

9 µF

Solution

The given circuit is equivalent to one shown in the figure
$∴ C_{Ab} = \frac{9 \times 9}{9 + 9} μF = 4 .5 μF$ .

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