A ring carries a uniform linear charge density on one half and the linear charge density of same magnitude but opposite sign on the other half.

Define:- Linear charge density

The SI unit of linear charge density is

Write the formula for linear charge density .

The dimensional formula of linear charge density lambda is

The dimensional formula of linear charge density lambda is

Linear charge density for a circle of radius r is

Define linear charge density and write its SI units.

A large sheet carries uniform surface charge density sigma . A rod of length 2l has a linear charge density lamba on one half and -lambda on the second half. The rod is hinged at the midpoint O and makes an angle theta with the normal to the sheet. The torque experience by the rod is