Question

Assertion: A small electric dipole is moved translatonally from higher potential to lower potential in uniform electric field. Work done by electric is positive.
Reason: When a positive charge is moved from higher potential to lower potential, work done by electric field positive.
A. If both Assertion and Reason are true but Reason is the correct explanation of Assertion.
B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C. If Assertion is true, but the Reason is false.
D. If Assertion is false but the Reason is true.

Answer 1

Correct Answer - D
In uniform electrilc field net force on an electric dipole =0
therefore no work is done in transaltaional motion of the dipole.
Electric lines also flow from higher potential to lower potential. Electrostatical force of positive charge acts in the direction of electric field. Therefore, work done is positive.