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Consider a contour consisting of two semicircular parts with radii a and b, and two linear parts, each of length b−a. This contour carries a charge Q that is uniformly distributed along its length. Find the electric field at the center of the contour in terms of the given quantities.

Consider a contour consisting of two semicircular parts with radii a and b, and two linear parts, each of length b−a. This contour carries a charge Q that is uniformly distributed along its length. Find the electric field at the center of the contour in terms of the given quantities.

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Consider a contour consisting of two semicircular parts with radii a and b , and two linear parts, each of length b − a . This contour carries a charge Q that is uniformly distributed along its length. Find the electric field at the center of the contour in terms of the given quantities.

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