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Q.
A parallel plate capacitor (PPC) has $1\, \mu F$ capacitance. Charge of $+4\, \mu C$ is given to one plate $\&+2\, \mu C$ to other plate. Find potential difference across the capacitor.
Solution:
$\Delta V =\frac{ Q _{1}- Q _{2}}{2 C } $
$=\frac{4 \mu-2 \mu}{2 \times 1 \mu}=1\, V$