Close to the equator (Ecuador for instance) the Earth's magnetic field points horizontally to the north and consists of a value of B = 0.48 E-4 T.
i) Determine the magnitude of the velocity of an electron when its weight is to be precisely balanced by the magnetic force? The charge of the electron is q = -1.6 E-19 C and its mass is m = 9.11 E-31 kg.
ii) Determine the direction of the velocity of the electron?