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 positive z-direction at the rate of `10^(5)NC^(-1)m^(-1)`. The force experienced by the system having a total dipole moment equal to `10^(-7)`C m in the negative z- direction is

Explanation

`dF=F_(1)~F_(2)=qE_(1)~qE_(2)`
`=10^(4)xx10^(-6)`
`=10^(-2)N`
Direction of this force is along negative X-direction.
Here no torque acts on the system as `barP//barE`
(since `bartau=barPxxbarE`)