A thin disk of radius a carries a uniform surface charge density po [C/m²]. Find the energy required to move a negative point charge -q from a point very far from the disk (infinity) to a final position along its axis, a distance h from the center of the disk as shown. This can be done two ways using knowledge of the field and potential of a uniformly-charged disk, which is derived in the lecture slides. What is the force on the charge in its final resting position? What is the net force on the disk? X AZ h-e-q a Pso y

A thin disk of radius a carries a uniform surface charge density po [C/m²]. Find the energy required to move a negative point charge -q from a point very far from the disk (infinity) to a final position along its axis, a distance h from the center of the disk as shown. This can be done two ways using knowledge of the field and potential of a uniformly-charged disk, which is derived in the lecture slides. What is the force on the charge in its final resting position? What is the net force on the disk? X AZ h-e-q a Pso y