2. Suppose a ring-shaped thin metal sheet charged with a uniform surface charge density Ps and a finite wire of length 2L with a uniform line charge density pi. The sheet has an inner and outer radius given by a and b and the center of the wire coincides with the center of the ring, as shown in the illustration. a (1) Use Coulomb’s Law to calculate the electric field at z > L and z < -L. (2) Under what conditions, can you make the electric field at z equal to zero for z >L and z <-L?

2. Suppose a ring-shaped thin metal sheet charged with a uniform surface charge density Ps and a finite wire of length 2L with a uniform line charge density pi. The sheet has an inner and outer radius given by a and b and the center of the wire coincides with the center of the ring, as shown in the illustration. a (1) Use Coulomb’s Law to calculate the electric field at z > L and z < -L. (2) Under what conditions, can you make the electric field at z equal to zero for z >L and z <-L?