Electrostatics Question 495

Question: In a certain charge distribution, all points having zero potential can be joined by a circle S. Points inside S have positive potential and points outside S have negative potential. A positive charge, which is free to move, is placed inside S [DPMT 2004]

Options:

A) It will remain in equilibrium

B) It can move inside S, but it cannot cross S

C) It must cross S at some time

D) It may move, but will ultimately return to its starting point

Show Answer

Answer:

Correct Answer: C

Solution:

A free positive charge move from higher (positive) potential to lower (negative) potential. Hence, it must cross S at some time.



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