26-27) Alpha particle in a magnetic field. A charge moves parallel to the magnetic field

26) An alpha particle has a charge of (+2e) and moving at right angles to a magnetic field B=0.27T with a speed v=6.15x105m/s. Calculate the force acting on this charged particle.
A) 5.3x10-14N B) 3.3x105N C) 2.7x10-14N D) 4.8x105N

27) A positive charge moving with a constant velocity (v) enters a region of uniform magnetic field as shown in the opposite figure. What is the direction of the magnetic force on the charge?
A) There is no magnetic force on the charge B) Left
C) Right D) To the top of the page