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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 17 - Electric Charge and Field > A thin glass rod is bent into a semi-circle of radius R . A charge +Q is uniformly distributed along the upper half and a charge −Q is uniformly distributed along the lower half as shown in figure. Calculate the the electric field E at P the centre of the semi-circle is

A thin glass rod is bent into a semi-circle of radius R . A charge +Q is uniformly distributed along the upper half and a charge −Q is uniformly distributed along the lower half as shown in figure. Calculate the the electric field E at P the centre of the semi-circle is

The flux of the point charge q through a circular disc of radius R at a distance a from it is