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1. Which of the following is not true about magnets and magnetic fields? A. The magnetic field lines around a straight current-carrying wire are loops. B. The magnetic field in an ideal solenoid can be assumed constant. C. All magnets have a North and South pole. D. The magnetic field lines outside of a bar magnet will point from South to North. 2. A negatively-charged particle is moving through a magnetic field, as shown below. What direction is the force on the particle? A. Left B. Right Ľ 200 C. Into the page D. Out of the page 3. A particle is fired perpendicular to a magnetic field, and begins to move in a circular path. Which of these will make the particle move in a larger circle? A. Increasing mass m. B. Decreasing the velocity v. C. Increasing the magnitude of charge q. D. Increasing the magnetic field strength B. B