Find capacitance of the given system.

Find the capacitance of the given system.

Two metal spheres of radius r have centers at a distance d apart in air. Find the capacitance of the system.

Two metal spheres of radius r have centers at a distance d apart in air. Find the capacitance of the system.

Find the capacitance of the system shown in figure.

Find the capacitance of the system shown in figure.

Find the capacitance of the system shown in figure.