An electic dipole has charges of +or- 4.10pC that are separated by 6.25cm. The d

Question

An electic dipole has charges of +or- 4.10pC that are separated by 6.25cm. The dipole lies on the x-axis, its positive end lies on the +x-axis, and its center is at the origin. Located at y= +4.40cm is a point charge carrying a charge of -2.85pC.

A) Determine the net force on the dipole. (ANSWER IN NEWTONS)

B) Determine the initial center of mass acceleration of the dipole (including direction) if it has a total mass of 8.85ng. (ANSWER IN M/S^2)

C) Determine the torque on the dipole about its center of mass. (ANSWER IN m*N)

D) Determine the direction of the torque on the dipole about its center of mass.

clockwise OR counterclockwise

Explanation / Answer

a)FOrece at dipole = q * E where E= K*p/r^3 where r =4.40 and p = (4.4^2 + 3.125^2)^1/2 i.e distance between point charge and dipole therefor F = q * K * p / (r^3) F=0.259 N b) F= ma a = F/m a= 0.259/ 8.85 * 10 ^-3 a= 29.37 m/s^2 c) torque = force * perpendicular distance torque = 0.259 * .440 torque = 0.1139 anticlock wise

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