Electric flux through surface $s_1$:

Two conducting plates, each $3 \mathrm{cm}\times 6 \mathrm{cm}$, and three slabs of dielectric, each $1 \mathrm{cm}\times 3 \mathrm{cm}\times 6 \mathrm{cm}$ and having dielectric constants of $1, 2$ , and $3$ , are assembled into a parallel plate capacitor with $\mathrm{d}=3 \mathrm{cm}$. Determine the two values of capacitance obtained by the two possible methods

of assembling the capacitor. Find $\frac{\left({\mathrm{C}}_{\text{higher }}-{\mathrm{C}}_{\text{Lower }}\right)}{{ϵ}_0}$ (in $\mathrm{cm}$ ). (Approximate the answer to the nearest integer)

Two isolated charged metallic spheres of radii $R_1$ and $R_2$ having charges $Q_1$ and $Q_2$, respectively, are connected to each other, then there is: