Electrostatics Question 694

Question: Two identical blocks are kept on a frictionless horizontal table connected by a spring of stiffness k and of original length l0. A total charge Q is distributed of spring at equilibrium of equal to x. Value of Q is

Options:

A) 204πε0k(0+x)

B) 2x4πε0k(0+x)

C) 2(0+x)4πε0kx

D) (0+x)4πε0kx

Show Answer

Answer:

Correct Answer: C

Solution:

[c] For maximum elongation charges on the blocks must be equal to 0/2 on each block.

14πε0Q2Q2(0+x)2=kx Q=2(0+x)4πε0kx.



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