1. Two point charges are brought closer together, increasing the force between t

Question

1. Two point charges are brought closer together, increasing the force between them by a factor of 86. By what factor was their separation decreased?

2. How far apart (in mm) must two point charges of 80.0 nC (typical of static electricity) be to have a force of 4.30 N between them?

mm

3. If two equal charges each of 1 C each are separated in air by a distance of 1 km, what is the magnitude of the force (in N) acting between them? You will see that even at a distance as large as 1 km, the repulsive force is substantial because 1 C is a very significant amount of charge.

N

Explanation / Answer

According to the chegg guidelines I am allowed to answer only 1 question at a time .

2) Q = 80.0 nC Force = 4.30 N

r = sqrt ( k * q1 * q2 / F )

r = sqrt ( 9 * 10 ^ 9 /4.30 ) * 80 * 10 ^ -9

r = 3.659965 mm =================================ANSWER)

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