Electrostatics Question 672

Question: It is required to hold equal charges q in equilibrium at the comers of a square. What charge when placed at the center of the square will do this?

Options:

A) q2(1+22)

B) q2(1+22)

C) q4(1+22)

D) q4(1+22)

Show Answer

Answer:

Correct Answer: D

Solution:

[d] AC=2l=BD or BO=12

FBO=FBD+(FBA+FBC)cos45

Solving, we get Q=q4(1+22) and Q should be negative of q.



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