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.
