Physics Magnetism,Magnetic Effects Of Current Level: High School

An electron moves through a region of crossed electric and magnetic field . The electric field E = 2000 V/m and is directed straight down . The magnetic field B = 0.80 T and is directed to the left . For what velocity v of the electron into the paper will the electric force exactly cancel the magnetic force?

a. 2500 m/s

b. 4000 m/s

c. 5000 m/s

d. 8000 m/s