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An electron perform circular motion of radious r, perpendicular to uniform magnetic field B. The kinetic energy gained by this electron in half revolution is _______ . (A) 1/2 mv² (B) 1/4 mv² (C) zero (D) πrBev

Answer»

c zeroExplanation:the electron will move in circular MOTION with CONSTANT VELOCITY THUS change in velocity is zero and so is the kinetic ENERGY



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