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A dipolo is placed in the field of a poi...

A dipolo is placed in the field of a point charge, the distance between the dipole and the field source being much greater than the dipole separation. Find the force acting on the dipole and the torque, if the dipole is arranged:
perpendicular to the line of force.

Text Solution

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It is evident from Fig. 24.8a that in this case a force couple acts on the dipole. The resultant of the couple is zero. To obtain the torque, multiply the force by the dipole separation.
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