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A different electric charge is placed on each of four identical conducting spheres, as shown in the figure below.

“Timothy Black. Created for Albert.io. Copyright 2016. All rights reserved.”

The charges placed on the four spheres are:

$q_1 = +11\text{ mC}$
$q_2 = +3\text{ mC}$
$q_3 = -6\text{ mC}$
$q_4 = +4\text{ mC}$

First, sphere one is placed in contact with sphere two. Then sphere three is placed in contact with sphere four.

What are the charges on each of the four spheres following these conduction events?

A

$q_1 = +12\text{ mC}$
$q_2 = +12\text{ mC}$
$q_3 = +12\text{ mC}$
$q_4 = +12\text{ mC}$

B

$q_1 = +3\text{ mC}$
$q_2 = +3\text{ mC}$
$q_3 = +3\text{ mC}$
$q_4 = +3\text{ mC}$

C

$q_1 = +7\text{ mC}$
$q_2 = +7\text{ mC}$
$q_3 = -1\text{ mC}$
$q_4 = -1\text{ mC}$

D

$q_1 = +14\text{ mC}$
$q_2 = +14\text{ mC}$
$q_3 = -2\text{ mC}$
$q_4 = -2\text{ mC}$

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