10. Which of the following diagrams best illustrates the magnetic field near a wire that carries an electron flow out of the plane of the paper? A. C. O B. D. 1 1. A proton and an alpha particle are both accelerated through a potential difference of 200 V. The ratio of the kinetic energy that the alpha particle acquires compared with the kinetic energy that the proton acquires is A. 8:1 C. 2:1 B. 4:1 D. 1:1 12. When two parallel wires carry current in opposite directions they A. repel each other due to the interaction of their electric fields. B. attract each other due to the interaction of their magnetic fields. C. attract each other due to the interaction of their electric fields. D. repel each other due to the interaction of their magnetic fields. 13. An electron and an alpha particle travelling at the same speed pass through the same magnetic field. Compared to the force exerted on the electron, the force exerted on the alpha particle is A. greater because the alpha particle's charge is greater. B. less because the alpha particle's mass is greater. C. less because the alpha particle's charge is greater. D. greater because the alpha particle's mass is greater. 14. The unit tesla is equivalent to the unit combination A. N B. Am C. N. m D. C' m A. m N C 'S N 'S