MHT CET 2026 Physics question
Two electric dipoles of moment P and 8P are placed in opposite directions on a line at a distance of 24 cm. The electric field will be zero at the point between the dipoles whose distance from the dipole of moment P will be . When 8P is replaced by 27P keeping all other quantities the same, the distance now becomes . The difference is (All the distances are measured from the centers of the dipole.)
Solution
On the axis of a short dipole the field is , directed along the dipole moment on either side. Since the two dipoles point in opposite directions, their axial fields oppose each other at points between them and can cancel. Case 1: let the point be from the dipole P, so it is
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