A charged particle is held at the center of a spherical shell. The figure gives

Question

A charged particle is held at the center of a spherical shell. The figure gives the magnitude E of the electric field versus radial distance r. The scale of the vertical axis is set by Es = 1.00107 N/C. Approximately what is the net charge on the shell?

A charged particle is held at the center of a spherical shell. The figure gives the magnitude E of the electric field versus radial distance r. The scale of the vertical axis is set by Es = 1.00 times 107 N/C. Approximately what is the net charge on the shell?

Explanation / Answer

on the surface

E = k*Q/R^2

4*10^7 = 9*10^9*Q/0.03^2

Q = 4*10^-6 C

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