Definition of Terms

What do the following words or phrases mean? Write a concise description of one or two sentences for half of them (choose some that you will need to look up!). Answers can be found in the online glossary, the PTA books or in your notes. Please try to use your own words.

  1. Fuse
  2. Flex
  3. Live, neutral, earth
  4. Human conductivity
  5. Double insulation
  6. Charge
  7. coulomb
  8. Current
  9. ampere (or coulomb per second)
  10. Diode
  11. Oscilloscope
  12. a.c. and d.c.
  13. Frequency (of a.c. mains)
  14. Voltage
  15. Peak voltage (of a.c.)
  16. Capacitor
  17. How to connect a voltmeter
  18. How to connect an ammeter
  19. Resistance
  20. Ohm's Law
  21. Thermistor
  22. Rheostat
  23. Potentiometer
  24. Electrical Energy - the joule
  25. Power - the Watt
  26. Filament lamp
  27. Discharge lamp
  28. Fluorescent lamp
  29. Difference between a filament lamp and a bar heater
  30. Voltages In a Series circuit Add (VISA)
  31. Four equations for current and voltage in series and parallel circuits
  32. Resistance in open and short circuits
  33. Consumer unit (fuse box)
  34. Advantage of the ring main circuit
  35. Miniature circuit breaker (MCB)
  36. The kilowatt-hour
  37. Bar magnet and magnetic field
  38. Electromagnet
  39. Electromagnetic induction
  40. Reed switch
  41. Reed relay
  42. Movement of current carrying wire in magnetic field
  43. Motor