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Electrostatics question

2011 · Shift 0 · Q64
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Electrostatics question

2011 · Shift 0 · Q64

JEE MainPhysicsElectrostaticsMCQ+4 / −1
Two identical charged spheres suspended from a common point by two massless strings of length lll are initially a distance d(d<<1)d\left( {d \lt \lt 1} \right)d(d<<1) apart because of their mutual repulsion. The charge begins to leak from both the spheres at a constant rate. As a result charges approach each other with a velocity vvv. Then as a function of distance xxx between them,
  1. A
    v ∝ x−1v\, \propto \,{x^{ - 1}}v∝x−1
  2. B
    y ∝ x12y\, \propto \,{x^{\frac{1}{2}}}y∝x21​
  3. C
    v ∝ xv\, \propto \,xv∝x
  4. D
    v ∝ x−12v\, \propto \,{x^{ - \frac{1}{2}}}v∝x−21​
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