11 Several electrons move at speed 9.20 x 10 m/s in a uniform magnetic field with magnitude B = 0.600 T directed downward. a. d 20.0% b 20,0 B 130.0 Find the magnetic force on the electron at point b. N into the pageA solenoid has 4090 turns per meter and radius 3.30 cm. The magnetic field inside has magnitude 0.240 T. What is the current in the 12 solenoid?The magnetic field in a cyclotron used in proton beam cancer therapy is 0.880 T. The dees have radius 94.0 cm. What maximum speed 1 3 can a proton achieve in this cyclotron? The mass of a proton is 1.673 X 1027 kg. m/s A uniform magnetic field points vertically upward; its magnitude is 0.770 T. An electron with kinetic energy 3.50 >