Question 1 0 / 1 Pts Magnetic eld lines are directed from the north pole of one magnet to the north pole of another magnet. from the south pole of one magnet to the south pole of another magnet. from the south to the north pole of a magnetic. from the north to the south pole of a magnet. A proton and an electron are moving at the same velocity through a particular uniform magnetic eld. Which of the following statements about the force on each of these particles is true? The force on the proton is greater in magnitude and opposite in direction to the force on the electron. The force on the proton is greater in magnitude and equal in direction to the force on the electron. The force on the proton is equal in both magnitude and direction to the force on the electron. The force on the proton is equal in magnitude and opposite in direction to the force on the electron. An electron moves in the plane of this screen toward the top of the screen. A magnetic eld is also in the plane of the screen and directed toward the right. What is the direction of the magnetic force on the electron? Toward the left edge of the screen. Toward the bottom of the screen. Toward the right edge of the screen. Into the screen. Out of the screen. Toward the top of the screen. A charged particle is moving perpendicular to a magnetic field in a circle with radius r. An identical particle enters the field, with v perpendicular to B, but with a higher speed than the first particle. Compared with the radius of the circular path for the first particle, the radius of the circular path for the second particle is O larger. O smaller. O the same size.A cyclotron uses a combination of magnetic and electric elds to accelerate charged particles to very high speeds. Which of the following statements is true about a particle in a cyclotron? As the particle accelerates, both its cyclotron frequency and the radius of its circular path decrease. As the particle accelerates, its cyclotron frequency remains constant but the radius of its circular path increases. As the particle accelerates, its cyclotron frequency remains constant but the radius of its circular path decreases. As the particle accelerates, both its cyclotron frequency and the radius of its circular path increase