1.

A small uncharged metallic sphere is positioned exactly at a point midway between two equal and opposite point charges. If the sphere is slightly displaced towards the positive charge and released then

Answer»

it will oscillate about its original position
it will move further towards the POSITIVE charge
its electric potential energy will decrease and kinetic energy will increase
its total energy remains CONSTANT but is non-zero

Solution :INITIALLY the force on the sphere is equal due to both -ve and +ve charge.
`therefore`NET force=0
On displacing the sphere towards the +ve charge, force on sphere due to +ve charge will be more than due to the -ve positive charge, because it is nearer. so, sphere wil move further to the charge.


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