LIVE Course for free

Rated by 1 million+ students
Get app now
0 votes
in Physics by (74.5k points)
closed by

Two small equally charged spheres, each of mass m, are suspended from the same point by silk threads of length l. The distance between the spheres x << l. Find the rate dq/dt with which the charge leaks off each sphere if their approach velocity varies as v = a/\(\sqrt V\) bar x, where a is a constant.

1 Answer

+1 vote
by (68.2k points)
selected by
Best answer

Let the balls be deviated by an angle θ, from the vertical when separtion between them equals x.

Applying Newton’s second law of motion for any one of the sphere, we get, 

T cos θ = mg    .....(1)

and T sin θ = F     ......(2) 

From the Eqs. (1) and (2)

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.