Two identical charged spheres suspended from a common point by two massless strings of…
Physics · Class 12 · CBSE — Electric Charges and Fields
Two identical charged spheres suspended from a common point by two massless strings of lengths l, are initially at a distance d(d << l) apart because of their mutual repulsion. The charges begin to leak from both the spheres at a constant rate. As a result, the spheres approach each other with a velocity v. Then v varies as a function of the distance x between the spheres, as
- v \(\propto x^{\frac{1}{2}}\)
- v \(\propto\) x
- v \(\propto x^{-\frac{1}{2}}\)
- v \(\propto\) x-1
Answer
(C) v x^ - 1 2
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