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2. The energy transformed per second
3. Protector/Indicator of danger
4. A blocking path/part which varies!
9. Another name for gas relay or sudden pressure relay
12. Energy from sources that will never give up on us
13. Used as a light source in a cathode ray tube
17. Make connection by pushing it in!
18. A tool that squashes connection onto wire
19. wave A wave with only two possible values/produced by binary logic device
20. The production of a printed circuit through the removal of unwanted areas of copper foil from a circuit board

1. Current flow over time
3. An electrical concept associated with putting metals close to energized lines
5. An effect which creates electricity
6. generates a continous output waveform
7. A switch that is actuated by another electrical signal
8. Electrical device that can change an alternating voltage
10. Phase-locked oscillator
11. Absorbs sound or electromagnetic wave reflections
14. Kind of electricity resulting from a build up of charged particles
15. Relates to touch
16. A switch that open a circuit when too much current is flowing