Step 1:

The three capacitors are connected in series with a supply.

(a)

Find the total capacitance.

Consider be the total capacitance.

are in series.

So

Therefore the total capacitance is .

Step 2:

(b)

Find the potential difference across each capacitance.

Now find the total charge .

.

Substitute and in the total charge.

The total charge is .

Find the voltage across the capacitance .

Find the voltage across the capacitance .

Find the voltage across the capacitance .

The voltage across the capacitors are .

Solution :

(a) The total capacitance is .

(b) The voltage across the capacitors are .