Question

You need a capacitance of $50mF$, but you don’t happen to have a $50mF$capacitor. You do have a $30mF$capacitor. What additional capacitor do you need to produce a total capacitance of $50mF$? Should you join the two capacitors in parallel or in series?

Short answer

The additional capacitance is of$20\mu F$and should be connected parallel.

Step-by-step solution

Given information

We need to find that the the two capacitors in parallel or in series.

Explanation

We have to add the capacitance and not decrease it. So, the additional capacitor will need to be connected in parallel.

The capacitance of this additional capacitor is given as

$C=50-30=20\mu F$.