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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A uniform surface charge of density σ is given to a quarter of a disc extending up to infinity in the first quadrant of x-y plane. The centre of the disc is at the origin O. Find the z-component of the electric field at the point ( 0 ,0 ,z ) and the potential difference between the points ( 0, 0, d ) & ( 0, 0, 2d).

A uniform surface charge of density σ is given to a quarter of a disc extending up to infinity in the first quadrant of x-y plane. The centre of the disc is at the origin O. Find the z-component of the electric field at the point ( 0 ,0 ,z ) and the potential difference between the points ( 0, 0, d ) & ( 0, 0, 2d).

The potential at the centre of the circle is