2. Breaking a bar magnet in half will produce A.a single north magnetic monopole. B.a single south magnetic monopole. C.one north and one south monopole. D.two identical bar magnets. Feb 29, 2012

5. A charged particle moves and experiences no magnetic force. From this we can conclude A.the particle must be massive B.no magnetic field exists in that region of space C.the particle is moving parallel to the magnetic field D.the particle is moving perpendicular to the magnetic field

6. A proton moves north in a magnetic field that is directed to the west. In what direction does the magnetic force act on the proton?

7. Two parallel straight wires each carry current in the same direction. What is the force (if any) between the wires.

8. A wire carrying a current of 10 A flows horizontally from left to right. What is the magnitude and direction of the magnetic field from this current 10 cm above the wire?

9. The magnetic field in the diagram is into the screen as shown. If a proton enters from the left, which way will it turn? xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx  v

10. The magnetic field in the diagram is out of the screen the as shown. If an electron enters from the left, which way will it turn? ∙ ∙ ∙ ∙ ∙ ∙ ∙ ∙ - v

11. The wire to the right carries current as shown. What is the direction of the magnetic force acting on the positive charge moving toward it? I  v

12. A solenoid is 20 cm long and wound with 5000 turns. If a 5A current flows through it, what is the value of the magnetic field at the center of the solenoid?