SATHEE: Electrostatics Question 391

Electrostatics Question 391

Question: Point charges $+ 4 q, - q$ and $+ 4 q$ are kept on the $x -$ axis at points $x = 0, x = a$ and $x = 2 a$ respectively, then [CBSE PMT 1992]

Options:

A) Only $q$ is in stable equilibrium

B) None of the charges are in equilibrium

C) All the charges are in unstable equilibrium

D) All the charges are in stable equilibrium

Show Answer

Answer:

Correct Answer: C

Solution:

Force on each charge is zero. But if any of the charge is displaced, the net force starts acting on all of them.

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Electrostatics Question 391

Question: Point charges +4q,−q and +4q are kept on the x− axis at points x=0,x=a and x=2a respectively, then [CBSE PMT 1992]

Options:

Answer:

Solution:

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Question: Point charges $+ 4 q, - q$ and $+ 4 q$ are kept on the $x -$ axis at points $x = 0, x = a$ and $x = 2 a$ respectively, then [CBSE PMT 1992]