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Please answer the question with appropriate explanation thanks

Please answer the question with appropriate explanation thanks

Question Image
Grade:11

1 Answers

Piyush Kumar Behera
435 Points
3 years ago
@Chandan Kumar.For solving this question you can use the potential enerdy of a dipole in a uniform electric field which is given as 
                                        U = -\vec{p}\cdot \vec{E}
so using this relation you can conserve total energy as there is no external work done.Initial total energy will only include potential energy where as the final total energy will include both potential as well as kinetic energy.Hence you can solve question as given in the image below