1.

Three charges are placed at the vertices ofan equilateraltriangle of side 'a'as shown in the following figure. Theforce experienced by the charge placed at the vertex A ina direction normal to BC is(a) QK4TE oa2(b)- Q24TE a2)(c) Zero[AIIMS 2003]

Answer»

Its zero.

Electric field at the equatorial point (vertex A) is parallel to BC.

The component of field perpendicular to BC will be E cos(90) = 0.

Force acts in the direction of electric field. Therefore there is no force perpendicular to BC.

(c) is correct option



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