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In a certain region of space, electric f...

In a certain region of space, electric field is along the Z-direction throught. 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)` per metre. Whay are the force and torque experienced by a system having a total dipolemoment equal to `10^(7)` Cm in the negative Z-direction?

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Only (c ) is right the rest cannot represent electrostaic field lines (a) is wrong because field lines must be normal to a conlductor (b) is wrong because field lines cannot start wrong because electrostatic field lines cannot form closed loops
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