Question

Near the equator, the Earth's magnetic field points almost horizontally to the north and has magnitude B=.5 x 10^-4T. What should be the magnitude and direction of the velocity of an electron if its weight is to be exactly balanced by the magnetic force?

Answer 1

Base in your question about the magnetic field of the Earth near the equator where as its almost horizontally to the north and has magnitude of B=0.5x10^-4t, the answer is Velocity of electron will be westwards.