I know the first part to this is zero. I cannot figure out the 2nd, 3rd, or 4th

Question

I know the first part to this is zero. I cannot figure out the 2nd, 3rd, or 4th part. I am assuming it is the same process for the second and third part and I just need to substitute in different numbers. I am sure the 4th part is different because it is outside of the sphere.

A solid sphere of radius 48 cm has a total positive charge of 25.8 mu C uniformly distributed throughout its volume. Calculate the magnitude of the electric field at the center of the sphere. Answer in units of N/C Calculate the magnitude of the electric field 12 cm from the center of the sphere. Answer in units of N/C Calculate the magnitude of the electric field 48 cm from the center of the sphere. Answer in units of N/C Calculate the magnitude of the electric field 81.4 cm from the center of the sphere. Answer in units of N/C

Explanation / Answer

2)E = k*Q*r/R^3 = 2.52*10^5 N/C

3)E = k*Q/R^2 = 10.07*10^5 N/C

4)E = k*Q/r^2 = 3.5*10^5 N/C

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