Two small spheres each of mass 10 mg are suspended from a point by threads 0.5 m long. They are equally charged and repel each other to a distance of 0.20 m. Then charge on each of the sphere is a21…

Question

Two small spheres each of mass 10 mg are suspended from a point by threads 0.5 m long. They are equally charged and repel each other to a distance of 0.20 m. Then charge on each of the sphere is a21 10^-8\ C. The value of 'a' will be:

Accepted Answer

Correct answer: 20. (20) JEE Main 2021 T sin = kq^2r^2 T cos = mg tan = kq^2 mgr^2 q^2= tan mgr^2k ∵ tan = 0.10.5= 15 q^2= 15 10 10^-6 10 0.2 0.29 10^9 q= 2 23 10^-8 after comparison from the given equation a = 20

$Two small spheres each of mass 10 mg are suspended from a point by threads 0.5 m long. They are equally charged and repel each other to a distance of 0.20 m. Then charge on each of the sphere is \frac{a}{21} \times 1 0^{- 8} C . The value of 'a' will be:$

Solution

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