A hollow conducting spherical shell has radii of 0.80 m and 1.20 m, as shown in

Question

A hollow                     conducting spherical shell has radii of 0.80 m and 1.20 m, as shown in the figure. The sphere carries a net excess charge of -500 nC. A point charge of +300 nC                     is present at the center. Calculate the electric Field at the following points from center:

a)  0.30m

b)  1.00m

c)  1.50m

PLEASE SHOW DETAILED WORK.  THIS IS A PRACTICE TEST PROBLEM AND WILL BE VERY SIMILAR TO 'REAL' TEST QUESTION.  THANKS FOR YOUR HELP FELLOW PEEPS!!

A hollow conducting spherical shell has radii of 0.80 m and 1.20 m, as shown in the figure. The sphere carries a net excess charge of -500 nC. A point charge of +300 nC is present at the center. Calculate the electric Field at the following points from center: 0.30m 1.00m 1.50m

Explanation / Answer

a) at = 0.3 m

Q_enclosed = +300 nC

E = k*Q/r^2 = 30000 N/C(radially out ward)

b) at r = 1m

E = 0(inside the conducting material E is always zero)


c)

at, r = 1.5 m

Q_enclosed = +300nc - 500nc = -200 nc

E = k*Q/r^2 = 800 N/C(radially inward)

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