7-) A conducting sphere, with an outer radius of 25 cm and an inner radius of 20 cm, has a surface charge density of 6.37 µC / m * 2. A charge of -0.50 µC is introduced into the internal cavity of the sphere. What is the new charge density just outside the sphere? One of these answers: -5.5 µC -4.5 µC 5.5 µC 4.5 µC

(c) Calculate the electric field, E, at the origin for the three scenarios given. The magnitude 4760 of all charges is 3 C and the charges form squares with each side 1-m long. k = 8.99 x 10°Nm²/C². =

(1) There is a charge, q = -5.66nC at the center of a green hemisphere of radius R1 3.11mm. There is also a blue hemisphere of radius R2 = 5.43cm which is centered at the same point of the green hemisphere (making the charge also at the center of the blue hemisphere). There is a flat red surface which is the shape of a flat donut connecting the two hemispheres making the entire surface a closed surface. a) What is the total flux through the entire surface? b) What is the net flux through the blue surface c) What is the net flux through the green surface? R2 R1 (b) Exploded view of the sur- face. (a) Full Surface.