Question

The combined capacitance of the arrangement shown in figure given below, in $\mu F$ is

• A. $\frac {30}{11}$
• B. $\frac {8}{11}$
• C. 4
• D. 1

Answer 1

Answer: (C)

4

Answer 2

Capacitors of $6 \mu F \, and \, 3 \mu F$ are in series, so
$\, \, \, \, \, \, \, \, C' = \frac {6 \times 3}{6 + 3}$
$= \frac {18}{9} = 2 \mu F$
Now C' is in paralleI with 2 uf capacitor, so
$C = C' + 2 = 2 + 2 = 4 \mu F$