Choose the correct answer and underline it or put a tick mark. a) Opposite magnetic poles repel 1. True 2. False The magnetic force acting on a moving point charge

in a magnetic field is maximum when 1. The charge is moving in a perpendicular direction to the magnetic field 2. The charge is moving in the same direction of the magnetic field 3. The velocity direction makes angle 30° with the magnetic field c) An electron moving in the direction of the positive x-axis enters a uniform magnetic field. It experiences a magnetic force in the negative y direction. The direction of the magnetic field is along: 1. The positive z-axis. II. The negative z-axis. III. The negative x-axis. IV. None of the above.