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General equation describing the charges in a capacitor

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safwatonline

safwatonline

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kind of elementary question, anyways what is the most basic/general equation describing the charges in a capacitor, is it
dq=C*dV
or dq=C*dV+V*dC

any reference will be great.
thanks
 

capacitance

delta_Q=C * delta_V
Q=C*V=C*delta_V+C*V0
 

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