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ID: 2134336 • Letter: 1
Question
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A point charge q1 = -8.3 uC is located at the center of a thick conducting shell of inner radius a = 2.9 cm and outer radius b = 4.2 cm, The conducting shell has a net charge of q2 = 2.3 uC. What is Ex(P), the value of the x-component of the electric field at point P, located a distance 7.7 cm along the x-axis from q1? N/C ? What is Ey(P), the value of the y-component of the electric field at point P, located a distance 7.7 cm along the x-axis from q1? N/C ? What is Ex(R), the value of the x-component of the electric field at point R, located a distance 1.45 cm along the y-axis from q1? N/C ? What is Ey(R), the value of the y-component of the electric field at point R, located a distance 1.45 cm along the y-axis from q1? N/C ? What is sigma (b) the surface charge density at the outer edge of the shell? C/m2 ? What is sigma(a) the surface charge density at the inner edge of the shell? C/m2 ? multi choice For how many values of x: (4.2 cmExplanation / Answer
E = k qtotal/r^2 = 9E9*(-8.3E-6+2.3E-6)/7.7E-2^2=-9.11E6 N/C
2) Ey = 0
3) along y axis so
Ex = 0
4) E = 9E9*-8.3E-6/1.45E-2^2=-3.55E-8 N/C
5) sigma = Q/A = (2.3E-6-8.3E-6)/(4*pi*4.2E-2^2)=-2.71E-4
6) sigma = Q/A = 8.3E-6/(4*pi*2.9E-2^2)=7.85E-4
7) a none
8) E0>E2
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