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Homework Statement
A hollow ball of radius 5 cm, made of very thin glass, is rubbed all over with a silk cloth and acquires a negative charge of -9.5e-08 C which is uniformly distributed all over its surface. Location A, shown in the diagram, is inside the sphere, 1 cm from the surface. Location B, shown in the diagram, is outside the sphere, 2 cm from the surface. There are no other charged objects nearby.
Which of the following statements about Eball, the magnitude of the electric field due to the ball, are correct? Select all that apply.
1. At location A Eball is 0 N/C.
2. At location B Eball is 2.14 x10^6 N/C.
3.A hydrogen atom at location A would polarize because it is close to the negative charges on the surface of the sphere.
4.All of the charges on the surface of the sphere contribute to Eball at location A.
Homework Equations
(1/4*pi*epsilon)*Q/R^2
The Attempt at a Solution
So i checked at point B that the it is ~2.14 x10^6 N/C. I thought that inside the sphere the electric field is 0, but its an insulator so that means its not. And I am guessing that all of the charges contribute to Eball at location A?
is that looking correct?