Across
- 3. turns mechanical energy into electrical energy
- 4. each end of the magnet has one
- 10. uses earths magnetic poles to tell direction
- 12. your thumb indicates the direction of current flow; your fingertips indicate the direction of the magnetic field
- 13. performed many experiments involving electricity and magnetism.
- 14. normal magnets and current carrying wires are subject to this
- 15. like poles react in this way
- 17. wire that carries electrical current that creates a magnetic field
- 19. physicists use these to show these magnetic fields
- 22. object which creates an electric field by means of a series of solenoids carrying high electrical currents
- 24. number of field lines passing through a surface perpendicular to the lines
- 25. a region within a magnetic material in which the magnetization is in a uniform direction
- 26. connection between electric current and magnetic fields was discovered by this man
Down
- 1. property of a material where every partical is a dipole
- 2. change in the Earth's magnetic field resulting in the magnetic north being aligned with the geographic south, and the magnetic south being aligned with the geographic north
- 5. most likely invented the compass
- 6. a cylindrical coil of wire acting as a magnet when carrying electric current
- 7. electric motor that converts direct current electrical energy into mechanical energy
- 8. adjective describing a silicate mineral or igneous rock that is rich in magnesium and iron
- 9. the formation of new areas of oceanic crust
- 11. type of rock which is ferromagnetic and can become magnetized
- 16. opposite poles react in this way
- 18. the rotating coil or coils of an electric motor
- 20. instrument for detecting and measuring small electric currents.
- 21. process of heating a material in order to align the partical’s poles
- 23. electric motor driven by an alternating current