Nicholas - Electric circuits

2. a device that receives one or more electrical input signals
3. a type of switch that works using an electromagnet
5. formula to find resistance(in words, use / to represent divide)
7. it is used to respond changes in the environment such as light or temperature.
8. a table that shows all the possible combinations of input.
12. how many circuits are used when using a relay?
14. an abbreviation which describes one of the types of circuit breakers which protects the user rather than the cable.
15. a component that allows electric current to flow in one direction only.
16. a resistor that can alter the the amount of current in a circuit.
17. It is used to control the amount of current in a circuit.
19. the unit of resistance
20. a diode that give out light when a current flows through them.

1. formula to find current(in words, use / to represent divide)
4. an example of input transducer used in a burglar alarm system.
6. gate Among the three gates in logic gate, which gate is the simplest?
9. a type of resistor that is used in an electric kettle.
10. a process of converting alternating current to direct current.
11. an element found in graphite that is also used to make resistors.
12. how many types of gates are there in logic gates?
13. an abbreviation of a type of 'variable resistor' whose resistance depends on the amount of light falling on it.
18. a type of resistor whose resistance depends on changes on its temperature.