A charged bead can be kept in suspension by a 10 nC charge located 5 cm...
A charged bead can be kept in suspension by a 10 nC charge located 5 cm above the bead. Where should a −2.5 nC charge be placed to obtain the same effect?
A) 2.5 cm above the bead
B) 1.25 cm above the bead
C) 1.25 cm below the bead
D) 2.5 cm below the bead
the answer is D, but I dont know why
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A charged bead can be kept in suspension by a 10 nC charge
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A small glass bead charged to 7.7 nC is in the plane that
bisects a thin, uniformly charged, 10-cm-long glass rod and is 4.0
cm from the rod's center. The bead is repelled from the rod with a
force of 850 ?N.What is the total charge on the rod?Express your answer to two significant figures and include the
appropriate units.
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