A charge q = 2.00 mu C is placed at the origin in a region where there is alread

Question

A charge q = 2.00 mu C is placed at the origin in a region where there is already a uniform electric field E rightarrow = (100 N/C) i^. Calculate the flux of the net electric field through a Gaussian sphere of radius R = 10.0 cm centered at the origin. ( epsilon 0 = 8.85 times 10-12 C2/N . m2) A hollow conducting spherical shell has radii of 0.80 m and 1.20 m, as shown in the figure. The sphere carries an excess charge of - 500 nC. A point charge of +300 nC Ls present at the center. The surface charge density on the inner spherical surface is closest to

Explanation / Answer

12) net flux = qenc/e0 = 2.0E-6/8.85E-12=2.26E5

so A)

13) since E = 0 in conductor

net flux inside = 0

then Qinside + 300 = 0

qincise = -300 nC

density = -300.0E-9/(4*pi*0.8^2)= -4.0E-8

so C)

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