Answer
$q_1=3.33\times10^{-4}C$
Work Step by Step
As we know that
$q_1=\frac{C_1C_2 V}{C_1+C_2}$
We plug in the known values to obtain:
$q_1=\frac{1\times10^{-6}\times5\times10^{-6}\times100}{1\times10^{-6}+5\times10^{-6}}$
$q_1=3.33\times10^{-4}C$
