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A thin wire AC shaped as a semi-circle...

A thin wire `AC` shaped as a semi-circle of diaameter `d = 20 cm` rotates with a constant angular velocity `omega = 100` rad/s in a unifrom magnetic field of induction `B = 5.0 mT`, with `omega uarr uarr B`. The rotation axis passes through the end `A` of the wire and is perpendicular to the diameter `AC`. Find the value of a line intergal `int E dr` along the wire from point `A` to `C`. Generalize the botained result.

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