An electric current i enters and leaves a uniform
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An electric current i enters and leaves a uniform circular wire of radius a through diametrically opposite points.
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An electric current ıı enters and leaves a uniform circular wire of radius Rℜ through diametrically opposite points. A charged particle q moving along the axis of the circular wire passes through the centre at speed vv. The magnetic force acting on the particle when it passes through the centre is Zero.
ANSWER : Zero
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