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Electricity & Magnet
| Question | Answer |
|---|---|
| Law of Conservation of Charge | electric charges can be moved from object to object but cannot be created or destroyed. |
| magnetic | when an object attracts or repels a magnet |
| attract | what happens when unlike charges pull together |
| repel | what happens when like charges push away from each other |
| poles | the two ends of any magnet |
| magnetic field | an area of magnetic force surrounding a magnet |
| conductor | a material that allows electricity to easily flow through it (metals, water, and people) |
| insulator | a material that blocks the flow of electricity through it (rubber, plastic, and glass) |
| static electricity | occurs when there is an imbalance of positive and negative charges (does not flow) |
| Electric Current | The flow of negative charges through a wire or conductor. Measured in AMPS |
| parallel circuit | electricity flows in two or more paths or loops If there is a break in the loop, the other bulbs will still light. |
| series circuit | electricity flows in one path or in a single loop If any bulbs burn out, the others will go out too. |
| circuit | A closed loop that electric current follows caused by differences in current, voltage and resistance |
| semiconductor | a solid substance that has a conductivity between that of an insulator and that of a conductor |
| voltage difference | The force that causes electrical charges to flow from high voltage to low voltage. measured in VOLTS |
| Resistance | the tendency for a material to oppose the flow of electrons, changing electrical energy into thermal energy and light. Measured in Ohms |
| Ohm's Law | the current in a circuit equals the voltage difference divided by the resistance |
| diode | a semiconductor device that allows the flow of current in one direction only. |
| Generator | A machine that converts mechanical energy into electrical energy |
| Law of electric charges | the law that states that like charges repel and opposite charges attract |