Two conducting hollow spheres are placed one inside the other so they share a common center. The inner sphere has a radius of 10 cm and a charge of +7 microcoulombs; the outer sphere has a radius of 20 cm and a charge of -5 microcoulombs.
Because of the symmetry of the situation, if there is a net electric field it will be directed either away from the center or toward the center. Gauss' law tells us that the electric field inside the inner sphere is zero. The electric field in the region between the spheres...
Next question : E - Field outside two charged spheres.
Previous question : C - Three charges - where is the field zero?
List of conceptual questions for test 1.
Created by Andrew Duffy, Boston University Physics Department.
Last update June 15, 1998