(adsbygoogle = window.adsbygoogle || []).push({}); Electrostatic force problems, help urgent!

1. The problem statement, all variables and given/known data

Question: An isolated hollow metal sphere of radius 40 cm carries a charge of -10*10^-6.

What is the magnitude of the electric field E (a) in the empty space inside the sphere and (b) 60 cm from the center of the sphere ( no picture provided )

2. Relevant equations

Electrostatic force= K * q1*q2/ d^2

3. The attempt at a solution

I´ve tried to use Coloumb´s law to get to the correct answer , what im having trouble to realize is 1. is there even an electric field within a hollow sphere,? and 2. do you count the distance in problem B from the surface of the sphere or from the center? I tried the center , and i got the wrong answer, don´t know if that is the problem. HELP URGENT , test coming up! :O :(

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# Homework Help: Electrostatic force problems, help !

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