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Transcript 
Electricity and Magnetism
Lecture III
Kimal Honour Djam
ASFA
Two uncharged, conducting spheres, A and B, are held at rest on insulating stands and
are in contact. A positively charged rod is brought near sphere A as suggested
in the figure. While the rod is in place, someone moves
sphere B away from A.
How will the spheres be charged, if at all?
Two positive point charges Q and 2Q are separated by a
distance R. If the charge Q experiences a force of magnitude F
when the separation is R, what is the magnitude of the force on
the charge 2Q when the separation is 2R ?
A)
B)
C)
D)
E)
F/4
F/2
F
2F
4F
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