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NEET Sample Paper NEET Sample Test Paper-42

  • question_answer
    In the figure, a proton moves a distance d in a uniform electric field E as shown in the figure. Does the electric field do a positive or negative work on the proton? Does the electric potential energy of the proton increases or decreases:

    A) -ve, increase      

    B) +ve, decrease

    C) -ve, decrease     

    D) +ve, increase

    Correct Answer: A

    Solution :

    \[\operatorname{W}=F.d\] Proton is moving against the direction of electric field, so W=F d Cos \[180\mathbf{{}^\circ }\] \[\operatorname{W}=-ve\] Proton is moving in electric field from low potential region to high potential region, its potential energy is increases.


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