The metal plate on the left in figure carries a charge $+q$. The metal plate on the right has a charge of $-2q$. What charge will flow through $S$ when it is closed, if central plate is initially neutral
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In steady state the charges will apper on
different faces of the plates are shown in figure
Net charge on central plate is $+ \mathrm{q} .$ Thus, $+ \mathrm{q}$ charge will flow through the switch.
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