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Electric Charges and Fields — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsElectric Charges and Fields1 Mark
Question
Two identical blocks are kept on a frictionless horizontal table connected by a spring of stiffness K and of original length $\ell_0$ A total charge Q is distributed on the block such that maximum elongation of sparing at equilibrium is equal to x value of q is:
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Answer

  1. $2(\ell_0+\text{x})\sqrt{4\pi\epsilon_0\text{kx}}$

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