Question

consider a solid sphere having a point charge Q at its centre and mass M is initially at rest on a rough surface as shown in figure and electric field E is applied in the horizontal direction the minimum value of the coefficient of friction so that it rolls without slipping on the surface is
a) 2qE/5mg
b) 2qE/7mg
c) 4qE/7mg
d) 4qE/5mg​

Answer 1

consider a solid sphere having a point charge Q at its centre and mass M is initially at rest on a rough surface as shown in figure and electric field E is applied in the horizontal direction the minimum value of the coefficient of friction so that it rolls without slipping on the surface is

a) 2qE/5mg

b) 2qE/7mg✔️

c) 4qE/7mg

d) 4qE/5mg

Answer:-

2qE/7mg