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Question

Two particles A and B having oposite charges 2.0×106C and 2.0×106C, are placed at a separation of 1.0 cm. (a) Write down te electric diple moment of this pair. (b) calculate the electric field at a Point on the axis of the dipole 1.0 m away from the centre. (c) Calculat the electric field at a point on the perpendicular bisector of the dipole and 1.0 m away from the centre.

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Solution

(a) Dipole moment =q×1
[where q = magnitude of charge, l = separation between the harges]
=2×106×102cm=2×108cm
(b) We know , electricifield at axial point of the dipole =36×107N/C

(c) We know electri field at a point on the perpendicular bisector about 1 m away from the centre of dipole
= 180 N/C


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