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A positive charge q is placed in a spher...

A positive charge q is placed in a spherical cavity made in a positively charged sphere. The centres of sphere and cavity are displaced by a small distance `vec(l)`. Force on charge q is :

A

in the direction parallel to vectro ` vec l`

B

in radial direction

C

in a direction which depends on the magitued of charge density in sphere

D

direction can not be delermined .

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The correct Answer is:
A
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