A dipole of electric moment p is located at a distance r from a long thread charged with a linear density `lambda` . Find the force on the dipole if (

Monjur Alahi

A dipole of electric moment p is located at a distance r from a long thread charged with a linear density `lambda` . Find the force on the dipole if (a) if is placed parallel to the thread , (b) perpendicular to the thread .
[Hint : Field due to long thread = `(1)/(2 pi epsi_(0)) (lambda)/(r)`]


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Salim Ahmed Kawsar

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Correct Answer - (a) F = 0 , (b) `F = -(lambda p)/(2 pi epsi_(0)r^(2))`

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