NEET 2016 Physics question
Two identical charged spheres suspended from a common point by two massless strings of lengths , are initially at a distance () 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 . Then varies as a function of the distance between the spheres, as
Answer: (3)
Solution
Each sphere is in equilibrium under gravity , string tension and the electrostatic repulsion . For small angle with the vertical, , so . Also . Equating, $ =
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account