Q. Across each of two capacitors of capacitance $ 1\mu F, $ a potential difference of $10\, V$ is applied. Then positive plate of one is connected to the negative plate of the other, and negative plate of one is connected to the positive plate of the other. After contact:
Delhi UMET/DPMTDelhi UMET/DPMT 2005Electrostatic Potential and Capacitance
Solution:
A capacitor is an arrangement which can store sufficient quantity of charge.
Suppose on giving a charge $q$ to a conductor the electric potential of the conductor becomes $V$.
Then the capacitance of the conductor is
$C=\frac{q}{V}$ When two capacitors are connected as given, then charge will be redistributed in the ratio of their capacitance, so charge on each capacitor will be different but non-zero.
