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# 2 small spheres each having mass of m kg and charge of q coiumb are suspended from a point by insulating thread of l m and negligible mass. if theta is the angle .. show that "q square=4pie e(4mgl square sin square thetatan theta).

## 2 small spheres each having mass of m kg and charge of q coiumb are suspended from a point by insulating  thread  of l m and negligible mass. if theta is the angle .. show that "q square=4pie e(4mgl square sin square thetatan theta).

SAGAR SINGH - IIT DELHI
879 Points
10 years ago

Dear student,

Electric force F=qE sin theta

E=q/4pie epsilon r^2

Gravitational force F =mg*

take components of gravity as well.

Equate the two forces and you will get the desired result.

All the best.

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Sagar Singh

B.Tech, IIT Delhi

JUST SHASHANK
16 Points
10 years ago

therefore,q(square)=4pie(absylum not)[4mgl(square){sin(square)(theta)}tan(theta).