Three charges are at the corners of an isosceles triangle . The Three charges ar

Question

Three charges are at the corners of an isosceles triangle. The

Three charges are at the corners of an isosceles triangle. The plusminus 5.00?Ccharges form a dipole. Find the magnitude of the force the -10.00?C charge exerts on the dipole. Find the direction of the force the -10.00?C charge exerts on the dipole.(Suppose that y-axis directs to the top of the image.) For an axis perpendicular to the line connecting the plusminus 5.00?C charges at the midpoint of this line, find the torque (magnitude) exerted on the dipole by the -10.00?C charge.

Explanation / Answer

A) force of the 10uC charge on the dipole = 2*kq/x^2 * costheta

=2*9*10^9*5*10*10^-12/0.02^2 * (1.5/2)

=1687.5 N

b)it acts along the negative y axis (-j)

c)torque= F.d

=2*9*10^9*5*10*10^-12/0.02^2 * (1-(1.5/2)^2)*0.015

=14.7656 Nm

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