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Question (11)
QN0038889

An electron is taken from point  to point  along the path  in a uniform electric field of 

           intensity .   Side , and side . Then, the amount of work 

           done on the electron is                                                                                                                      

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: B
Explanation:

should be zero, because in moving from  to , we always move perpendicular to field. Hence, force applied by field and displacement will be at .

So

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Question (12)
QN0038890

In the electric. field of a point charge , a certain charge is carried from point  to  and . Then the work done is            

 

  • (A)

    least along the path 

  • (B)

    least along the path 

  • (C)

    zero along all the paths  and 

  • (D)

    least along 

Correct Answer: C
Explanation:

is an equipotential surface, on equipotential surface no work is done in shifting a charge from one place to another.

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