Question

Find the equivalent capacitance across $A$ and $B$.

• A. $\frac{28}{3}\mu F$
• B. $\frac{15}{2}\mu F$
• C. $15\mu F$
• D. None

Answer 1

Answer: (B)

Circuit can be redrawn as:

Now, $V_x=V_y$
Hence, $\frac{35\mu F}{10\mu F}=\frac{7\mu F}{2\mu F}$
$C_{eq}=\left(\frac{7\times 35}{7+35}\right)+\left(\frac{10\times 2}{10+2}\right)$
$=\frac{35}{6}+\frac{10}{6}=\frac{45}{6}$
$C_{eq}=\frac{15}{2}\mu F$