Answers to practice exam #1
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1) there is a rearrangement of the electrons in the ball
2) the object is positively charged
3) L is positive and M is negative
4) both spheres are positively charged
5) at none of these places (there is no place)
6) midway between A and B
7) parallel to the line joining Q and -Q (left)
8) According to Gauss' law...
9) 100 volts
10) III
Bonus: V
Partial Credit
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p7 a) zero
b) zero
p8 -158,000 volts
1 volt = 1 joule/coulomb and 1 joule = 1 newton.meter
V/m or N/C are units of the electric field
6 pF