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Science
Electricity and magnetism
| Question | Answer |
|---|---|
| Electricity is a _____ of ______ | Flow, electrons |
| Electrical current is the _____ at which electrons flow | Rate |
| 2 types of electricity | Static and current |
| Electricity happens when electrons ______ in one location because of friction and move ____ in all directions | Build up, randomly |
| Current electricity flows in a specific direction along a path. The current flows from _____ to ________ | Positive, Negative |
| Direct current is when electrons flow in _____ direction | One |
| Alternating current is when electrons can ______ directions | Change |
| Resistance includes factors that affect how much electricity can flow through a _____ | System |
| 4 factors that affect resistance | Materials, length of wire, temperature, width of wire |
| Insulators examples | Rubber, wood |
| Conductors examples | Iron, copper |
| Semiconductors examples | Carbon, silicon |
| Voltage is the _____ from the power source that makes electrons _____ | Push, move |
| Volts are measured by a ____ | Volt |
| The more volts, the bigger the _____ so the conductor moves ______ | Push, faster |
| An _____ circuit results when the flow of electrons has been interrupted | Open |
| A ______ circuit results when the flow of electrons has been completed | Closed |
| Series | Where there is only one path: all parts connected in a single loop |
| Series examples | Christmas lights |
| Parallel | Two or more paths; all parts connected in multiple paths |
| Magnetism is a _____ exerted by magnets to either attract or repel each other | Force |
| A magnetic field is the area around the magnet where you can fell the magnetic force. It is the strongest around the _____ and weakest in the _____ | Poles, center |
| All metals are not magnetic. Only three elements that are naturally occurring magnets are: | Gold, silver and aluminum |
| Magnetic fields can produce electrical ______ in conductors | Current |
| Electricity can produce ______ fields | Magnetic |
| Both electricity and magnetism are called | Electromagnetic |
| An electromagnet is a temporary magnet. It is created when an _____ passes thorough a _____ | Electrical, magnet |
| 4 examples of electromagnets | Motors, door bells, MIR, generators |
| 3 parts of an electromagnet | Power source, iron core, solenoid |
| Making electromagnets stronger | More coils, more current |
| Motors convert _____ energy to _____ energy | Electrical, mechanical kinetic |
| Generators convert _____ energy to _____ energy | Mechanical kinetic, electrical |
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