In a certain region of space , electric field is along the z- direction throughout. The magnitude of electric field is, however , not constant but increases uniformly along the +ve z - direction , at the rate of 10⁵ NC ^{- 1}m^-1 . What are the force and the torque experienced  by a system having a total dipole moment equal to 10^-7 cm in the -ve z- direction ?

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force will hav magnitude along the +ve z direction