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sneha sunil raikar Grade: 12
        a thin conducting ring of radius R has linear charge density  ?=?'cosa  where  ?'is a constant and  a is the azimuthal angle. find the magnitude of the electric field strenght at the centre of the ring    
8 years ago

Answers : (1)

askiitian expert akshay singh
8 Points
										

hi sneha,


 after an angle a cut an element of length rda,so charge dq=?'cosa*rda


elec field due to this elemet ,dE=kdq/r


now consider another element of length rda at an angle -a,the magnitude dE due to both these elements is same


and therefore total elec field=2dE cosa in -x direction,sina components in +y dir.wll cancel out


 


so ,elec field at centre,E can be found by integrating this expression fron a=0 to pi and the elec field will be in -x direction.

8 years ago
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