Unit 9 Electricity and Magnetism

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Across
  1. 6. a group of atoms with aligned magnetic poles
  2. 10. this states that the current in a circuit equals voltage difference divided by resistance
  3. 12. a temporary magnet made by wrapping a wire coil carrying a current around an iron core
  4. 13. net movement of electric charges in a single direction through a wire
  5. 14. accumulation of excess electrical charges on an object
  6. 16. the tendency of a material to oppose the flow of electrons
  7. 17. a closed path that electric current follows
  8. 18. negatively-charged subatomic particle
  9. 20. this type of current reverses the direction of the current flow in regular patterns
Down
  1. 1. force that causes electric charges to flow
  2. 2. the strength between two magnets depends on the ___ between them
  3. 3. the process of transferring charge by touching is called charging by ___
  4. 4. when electric current flows through a wire, a ___ field forms around the wire
  5. 5. this type of circuit has current flowing in only one loop
  6. 7. a device that changes electrical energy into mechanical energy
  7. 8. this type of circuit has two or more branches for current to flow through
  8. 9. this type of current flows in only one direction
  9. 11. opposite charges ___
  10. 15. rearrangement of electrons on a neutral object caused by nearby charged objects is called charging by ___
  11. 16. like charges ___
  12. 19. positively-charged subatomic particle