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
It will remain in equilibrium
It can move inside S, but it cannot cross S
It must cross S at some time
It may move, but will ultimately return to its starting point
As we learned
Negative Potential -
Due to Negative charge.
-
A free positive charge move from higher (positive) potential to lower (negative) potential. Hence, it must cross S at some time.
Option 1)
It will remain in equilibrium
Option 2)
It can move inside S, but it cannot cross S
Option 3)
It must cross S at some time
Option 4)
It may move, but will ultimately return to its starting point
Study 40% syllabus and score up to 100% marks in JEE