Suppose the conducting spherical shell in the figure below carries a charge of 2

Question

Suppose the conducting spherical shell in the figure below carries a charge of 2.60 nC and that a charge of ?2.20 nC is at the center of the sphere. If a = 1.60 mand b = 2.40 m, find the electric field at the following.

(a)    r = 1.50 m

(b)    r = 2.20 m

(c)    r = 2.50 m

(d) What is the charge distribution on the sphere?

magnitude     N/C direction     ---Select--- radially inward radially outward The magnitude is zero. Suppose the conducting spherical shell in the figure below carries a charge of 2.60 nC and that a charge of ?2.20 nC is at the center of the sphere. If a = 1.60 mand b = 2.40 m, find the electric field at the following. (a) r = 1.50 m magnitude N/C direction ---Select--- radially inward radially outward The magnitude is zero. (b) r = 2.20 m magnitude N/C direction ---Select--- radially inward radially outward The magnitude is zero. (c) r = 2.50 m magnitude N/C direction ---Select--- radially inward radially outward The magnitude is zero. (d) What is the charge distribution on the sphere? inner surface nC outer surface nC

Explanation / Answer

k= 1/(4??) = 9*10^9
E = k*q/r^2
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a) k*(2.20*10^-9)/(1.5^2) =8.8 N/C
b) k*((2.60-2.40)*10^-9)/(2.2^2) = 3.7 N/C
c) k*(2.6^-9)/(2.5^2) = 2.65 N/C
d)inner surface = (2.4*10^-9)/(?*2.1^2) = 1.73*10^-10
outer surface = (2.6*10^-9)/(?*2.3^2) = 1.565*10^-10

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