click below
click below
Normal Size Small Size show me how
Unit 3 Vocab
Term | Definition |
---|---|
electric charge | a property that leads to electromagnetic interactions between the particles that make charge or no charge. |
static electricity | the buildup of electric charge on an object |
electrical conductor | a material through which charges can move freely |
electrical insulator | a material through which charges cannot move easily |
semiconductors | a special class of materials that conduct electric charge better than electrical insulators but not as well as electrical conductors |
electric current | the rate of flow of electric charges |
resistance | the opposition to the flow of electrical charge |
voltage | the amount of work required to move each unit of charge between two points |
electric circuit | a complete closed path through which electric charges can flow |
series circuit | all parts connected in a row that forms one path for the electric charges to flow |
parallel circuit | electric charges have more than one path that they can follow |
magnet | any material that attracts iron or objects made of iron |
magnetic force | when you bring two magnets together and they exert a force on eachother |
magnetic poles | two magnets that push eachother apart because of their two ends |
magnetic field | the area surrounding a magnet where magnetic forces can be detected |
electromagnetism | when electric currents and magnetic fields interact with eachother |
solenoid | a coil of wire that carries an electric current and produces a magnetic field |
electromagnet | wrapping a solenoid around an iron core |
electric motor | changes electrical energy into mechanical energy |
electromagnetic induction | using a magnetic field to create an electric current in a wire |
transformers | use induction to increase or decrease the voltage of alternating currents |
electric generators | use induction to change mechanical energy into electrical energy |
electronic devices | able to control the flow of electrons using integrated circuits |
integrated circuit | a single tiny chip of specially treated silicon containing many circuit powers |
analog signals | signals that change continuously in a given range |
digital signal | a sequence of separate values |
computer | any electronic device that performs tasks by following instructions given to it |