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Cryphonus
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Homework Statement
A sphere of radius R=10 cm made of insulating material has a uniform charge density p=100 C/m-3
a)Find the magnitude of the electrical field at a distance r<R, using Gauss' Law.What is the value of the electric field at r=5 cm?
b)What is the total charge on this sphere?
c)Find the magnitude of the electric field at a distance r>R using Gauss' Law.What is the value of the electrical field at r=10cm? At r=20 cm?
e)Take the voltage at r=0 to be 0 Volts.Find the Voltage V(r) at any r by integrating the Electrical field E(r) along the radial direction.
Homework Equations
Gauss' Law= [tex]\oint[/tex]E.ds=Qinside/E0 (permittivity constant)
The Attempt at a Solution
I managed to do b) since the density is provided to us we only have to find the Q from d= Q/V, V is 4/3Pi R3... but i certainly do need help with other questions.