Electronics

2. to change (an alternating current) into a direct current
3. a positively charged elementary particle that is a fundamental constituent of all atomic nuclei
7. A device that can store and release electrical charges very quickly
9. a closed electrical circuit in which the current is divided into two or more paths and then returns via a common path to complete the circuit
12. an elementary particle inside the nucleus of an atom having no charge and a mass slightly greater than that of a proton
14. The path of electrical current, fluids or gases
16. An atom or molecule with a net electrical imbalance either positive or negative
17. a circuit having its parts connected serially (one after the other) and with only one path of electrical current
19. the smallest component of an element having the chemical properties of the element
20. A device used to transfer electric energy from one circuit to another, especially a pair of multiply wound, inductively coupled wire coils that effect such a transfer with a change in voltage, current, phase, or other electric characteristic
21. a substance that easily allows the movement of heat or electricity through it

1. the process by which electrical or magnetic properties are transferred, without physical contact, from one circuit or body to another
4. Quality of an electric circuit, or any component in it, to oppose the flow of electrical current.
5. the positively charged mass within an atom, composed of neutrons and protons, and possessing most of the mass but occupying only a small fraction of the volume of the atom
6. The flow of electrons or electricity
8. an elementary particle that is a fundamental constituent (building block) of matter, having a negative charge and existing independently or as the component outside the nucleus of an atom
10. electrical force that causes electrons to move: "electrical pressure"
11. An electronic device that controls the flow of an electric current, most often used as an amplifier or switch
13. A semiconductor device that allows current to flow in only one direction. The electrical equivalent of a check valve.
15. a substance that does not easily allow the movement of heat or electricity through it.
18. an electromagnetically activated switch