Figure shows four Gaussian surfaces consisting of identical cylindrical midsections but different end caps. The surfaces are in a uniform electric field that is, directed parallel to the central axis of each cylindrical midsection. The end caps have these shapes: $S_1$, convex hemispheres; $S_2$, concave hemispheres: $S_3$, cones: $S_4$, flat disks. 

In the figure, a solid sphere of the radius $a=2.00 \mathrm{cm}$ is concentric with a spherical conducting shell of inner radius $b=2.00a$ and outer radius $c=2.40a$. The sphere has a net uniform charge $q_1=+5.00 \mathrm{C}$, the shell has a net charge $q_2=-q_1$. What is the magnitude of the electric field at radial distances $r=0$ from the centre?

In the figure, a solid sphere of the radius $a=2.00 \mathrm{cm}$ is concentric with a spherical conducting shell of inner radius $b=2.00a$ and outer radius $c=2.40a$. The sphere has a net uniform charge $q_1=+5.00 \mathrm{C}$, the shell has a net charge $q_2=-q_1$. What is the magnitude of the electric field at a radial distance $r=\frac{a}{2.00}$?

In the figure, a solid sphere of the radius $a=2.00 \mathrm{cm}$ is concentric with a spherical conducting shell of inner radius $b=2.00a$ and outer radius $c=2.40a$. The sphere has a net uniform charge $q_1=+5.00 \mathrm{C}$, the shell has a net charge $q_2=-q_1$. What is the magnitude of the electric field at the radial distance $r=a$?

In the figure, a solid sphere of radius $a=2.00 \mathrm{cm}$ is concentric with a spherical conducting shell of inner radius $b=2.00 a$ and the outer radius $c=2.40 a$. The sphere has a net uniform charge $q_1=+5.00 \mathrm{C}$, the shell has a net charge $q_2=-q_1$. What is the magnitude of the electric field at radial distances $r=1.50 a$?

In the figure, a solid sphere of the radius $a=2.00 \mathrm{cm}$ is concentric with a spherical conducting shell of inner radius $b=2.00a$ and outer radius $c=2.40a$. The sphere has a net uniform charge $q_1=+5.00 \mathrm{C}$, the shell has a net charge $q_2=-q_1$. What is the magnitude of the electric field at radial distances$r=2.30 a$?

In the figure, a solid sphere of the radius $a=2.00 \mathrm{cm}$ is concentric with a spherical conducting shell of the inner radius $b=2.00a$ and the outer radius $c=2.40a$. The sphere has a net uniform charge $q_1=+5.00 \mathrm{C}$, the shell has a net charge $q_2=-q_1$. What is the magnitude of the electric field at a radial distance $r=3.50a$?

In the figure, a solid sphere of the radius $a=2.00 \mathrm{cm}$ is concentric with a spherical conducting shell of inner radius $b=2.00a$ and outer radius $c=2.40a$. The sphere has a net uniform charge $q_1=+5.00 \mathrm{C}$, the shell has a net charge $q_2=-q_1$. What is the net charge on the inner surface of the shell?

In the figure, a solid sphere of radius $a=2.00 \mathrm{cm}$ is concentric with a spherical conducting shell of inner radius $b=2.00 a$ and outer radius $c=2.40 a$. The sphere has a net uniform charge $q_1=+5.00 \mathrm{C}$. The shell has a net charge $q_2=-q_1$. What is the magnitude of the electric field at radial distance $r=1.50 a$?

What is the net charge on the outer surface of the shell?