An electron moves through a uniform magnetic field given by B =B_{x}i^+(−3.0BB_{x})j^. At a particular instant, the electron bas velocity v=(2.0i^+4.0j^) m/s and the magnetic force acting on it is (6.4×10^{−19}N)k^. Find B_{x}

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An electron moves through a uniform magnetic field given by B =B_{x}i^+(−3.0BB_{x})j^. At a particular instant, the electron bas velocity v=(2.0i^+4.0j^) m/s and the magnetic force acting on it is (6.4×10^{−19}N)k^. Find B_{x}

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