The drawings show three charges that have the same magnitude but may have differ

Question

The drawings show three charges that have the same magnitude but may have different signs. In all cases the distance d between the charges is the same. The magnitude of the charges is |q|= 2.8 ?C, and the distance between them is d = 3.9 mm. Determine the magnitude of the net force on charge 2 for each of the three drawings.

(a)    F = ---Select---PaHzNm/sJ (b)    F = ---Select---m/sNPaHzJ (c)    F = ---Select---Nm/sJPaHz The drawings show three charges that have the same magnitude but may have different signs. In all cases the distance d between the charges is the same. The magnitude of the charges is |q|= 2.8 ?C, and the distance between them is d = 3.9 mm. Determine the magnitude of the net force on charge 2 for each of the three drawings.

Explanation / Answer

Magnitude of force between charge q1,q2 and q2,q3 = Kq^2/d^2= 9*10^9*2.8^2/(3.9^2*10^-6)=4.63*10^15 N. 2which we will call F.

Now,a) Force on q2 due to both q1 & q3 will be on left side with magnitude F each.

So net force 2F=9.26*10^15N.

B)Force on 2 due to 1 will be on right of magnitude F and on left due to 3 of magnitude F.

So they will cancel and net force=0.

C)forces will be perpendicular with same magnitude F.SO net force =2^0.5 F=6.56*10^15 N

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