Question

Equivalent capacity between $A$ and $B$ is:

• A. $2\mu F$
• B. $3\mu F$
• C. $4\mu F$
• D. $0.5\mu F$

Answer 1

Answer: (D)

Equivalent capacity of $1\mu F$ and $1\mu F$ capacitor joined in parallel
$C^{\prime }=1+1=2\mu F$

Now, this circuit can be represented as

Now, the total capacity of circuit in series
$\frac{1}{C}=\frac{1}{2}+\frac{1}{1}+\frac{1}{2}$
$C=\frac{1}{2}=0.5\mu F$