8. [-I2Points] I DETAILS I SERCP1115.8.P.051. I MYNOTES I ASKYOURTEACHER A point charge q is located at the center of a spherical shell of radius a that has a charge q uniformly distributed on its surface. Find the electric field for the following points: (a) for all points outside the spherical shell 0 none of these OE=O OE=q/4rrr2 _ 2 O E keq/r O E = kqu/r2 (b) for a point inside the shell a distance r from the center 0 none of these 0 E = q/4rrr2 O E = kqu/r2 O E = keg/r2 OE=O Need Help? Show My Work (Optional) @ 9. [-I3 Points] DETAILS SERCP11 16.1.P.007.MI. MY NOTES ASK YOUR TEACHER I PRACTICE ANOTHER Oppositely charged parallel plates are separated by 4.49 mm. A potential difference of 600 V exists between the plates. (3) What is the magnitude of the electric field between the plates? N/C H (b) What is the magnitude of the force on an electron between the plates? N H (c) How much work must be done on the electron to move it to the negative plate if it is initially positioned 2.96 mm from the positive plate? J H