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

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

Explanation / Answer

a) at r = 0.3 m

Q_enclosed = +300 n C

E = k*Q_elcosed/r^2

E = 30000 N/C (raidally out ward)

b)at r = 1 m
in side a conducting material electric field is always zero.

to make inside conducting material, -300 nc will be in inner surface of the
sphere and -200 nc will be on upper surface of the sphere.

Q_enclose = +300 nc - 300 nc = 0

E = k*Q_enclosed/r^2

E = 0


c) at r = 1.5 m

Q_elcosed = +300nc - 500 nc = -200 nC

E = k*Q_enclosed/r^2

E = 800 N/C (radially in ward)

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