# Homework Help: Parallel combination of capacitors

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1. Jan 6, 2017

### Saint xavier

1. The problem statement, all variables and given/known data

If the 2 charged capacitors are reconnected in parallel with plates of opposite polarity together then ? is common potential. In this condition how charge is conserved and same potential is maintained

2. Relevant equations

Net charge Q=C1V1-C2V2 Where C1V1=q1 and C2v2=q2
V = (C1V1-C2V2)/(C1+C2) Where C1 and V1 are capacitance and potential of one and C2 and V2 are of other?

3. The attempt at a solution

I solved but got confused in how they will attain same potential with charge conservation. Initially in a system net charge was q1+q2 but after combination it was q1-q2. Please describe the soln with description for charge conservation and common potential.

2. Jan 6, 2017

### Staff: Mentor

Hi Saint xavier, Welcome to Physics Forums!

Your problem statement seems to be incomplete. It's not clear how the capacitors were initially connected or to what potential difference(s) they were charged. Can you clarify this by providing the complete problem statement?

Try drawing a diagram for each connection scenario and label each capacitor plate with the charge it holds.