24. An electron moves through a uniform magnetic field given by . At aparticular instant, the electron has velocity m/s and the magnetic force actingon it is (6.4×10-19 N) . Find Bx.
(A) -1.6×10-19 T
(B) -3.2×10-19 T
(C) -0.22T
(D) -1.0T
(E) -2.0T