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[" Two charges "+q" and "-q" are attache...

[" Two charges "+q" and "-q" are attached to the two ends "],[" of a light rod of length "L," as shown in figure.The sys- "],[" tem is given a velocity perpendicular to magnetic "],[" field.The magnetic force on the system of charges "],[" and magnitude of force on one charge by the rod,"],[" are respectively "],[qquad int_(-9)^(+q)(o*vec B)]

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