An electron moves in a straight line at speed 250 m/s along the positive y-axisthrough uniform electric and magnetic fields. The magnetic field is directed intothe page and has magnitude 2 T. Neglect gravity. The mass of the electron is 9.1 x10³1 kg.a. What is the electric field (specify both magnitude and direction)?b. Now imagine the electric field has been turned off. What will be the radiusof the electron's subsequent path?

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