Combination of Capacitors
Before you go through this article, make sure that you have gone through the previous article on Series Combination of Capacitors.
We have discussed that capacitors may be connected to each other in the following ways
 Series Combination
 Parallel Combination
 Mixed Combination
In this article, we will discuss parallel combination of capacitors.
Parallel Combination of Capacitors
Two or more capacitors are said to be connected in parallel combination if

Expression For Equivalent Capacitance
Consider
 Three capacitors of capacitances C_{1}, C_{2} and C_{3} are connected in parallel across a battery.
 The battery maintains a potential difference V across the combination.
In parallel combination, the potential difference across each capacitor is same but the total charge drawn from the battery is divided among the individual capacitors.
In parallel combination, the total charge drawn from the battery is equal to the sum of charges on the individual capacitors i.e.
(Equation01)
In steady state, the charge on individual capacitors is given by
 For 1^{st} capacitor, Q_{1} = C_{1}V
 For 2^{nd} capacitor, Q_{2} = C_{2}V
 For 3^{rd} capacitor, Q_{3} = C_{3}V
Using these in Equation01, we get
(Equation02)
Now, we wish to replace the above parallel combination of capacitors with a single equivalent capacitor.
An equivalent capacitor is one which draws the same charge from the battery as drawn by the individual capacitors altogether. 
Replacing the parallel combination with an equivalent capacitor, we have
In steady state, for equivalent capacitor, we have
(Equation03)
On comparing Equation02 and Equation03, we get
This is the required expression for equivalent capacitance for a parallel combination of capacitors.
The formula can be extended for n capacitors in the same way.
In parallel combination,
the equivalent capacitance is equal to the sum of individual capacitances. 
Important Notes
Note01:
In parallel combination,
 The potential difference across each capacitor is same but charge divides among individual the capacitors.
 The total charge drawn from the battery is equal to the sum of charges on the individual capacitors.
Note02:
If two capacitors having capacitances C_{1} and C_{2} are connected in parallel combination, then their equivalent capacitance is given by
Note03:
If n capacitors each of capacitance C are connected in parallel combination, then their equivalent capacitance is given by C_{eq} = C + C + ……… n times. Thus,
Note04:
In parallel combination, the equivalent capacitance is larger than the largest individual capacitance.
Read the next article on
Energy Stored In A Charged Capacitor
Get more notes & other study material of the Chapter Electrostatic Potential & Capacitance.