Soldering and electronics

1. a board for making an experimental model of an electric circuit
4. Number one classroom rule
7. electric current that reverses its direction many times a second at regular intervals
8. a device used to store an electric charge, consisting of one or more pairs of conductors separated by an insulator
10. semiconductor light source that emits light when current flows through it
11. flow of electric charge that does not change direction
16. the strength of an electric current in amperes
17. fusible alloy used to join metal workpieces
19. a solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects
21. passive two-terminal electrical component that implements electrical resistance as a circuit element
22. a measurement of wire diameter

2. electronic technology that generates, stores, and processes data in terms of two states: positive and non-positive
3. the quantity determining the energy of mass in a gravitational field or of charge in an electric field
5. the pressure from an electrical circuit's power source that pushes charged electrons (current) through a conducting loop, enabling them to do work such as illuminating a light
6. computer processor where the data processing logic and control is included on a single integrated circuit, or a small number of integrated circuits
9. a semiconductor device with three connections, capable of amplification in addition to rectification
12. electrical safety device that operates to provide overcurrent protection of an electrical circuit
13. device that converts energy from one form to another
14. the flow of electricity in an electronic circuit
15. process in which two or more items are joined by melting and putting a filler metal (solder) into the joint
18. - cover with a thin layer of tin
20. E = IR