(Solution) - When an uncharged conducting ball of radius R is placed in an -(2025 Original AI-Free Solution)
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When an uncharged conducting ball of radius R is placed in an external uniform electric field, a surface charge density ? = ?0 cos ? is induced on the ball's surface (here a0 is a constant, 0 is a polar angle). Find the magnitude of the resultant electric force acting on an induced charge of the same sign.