7th grade chap. 6 Electricity
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Created by:
KristieSmith on November 3, 2010
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33 terms
Terms | Definitions |
|---|---|
 repel | Like electric charges ________each other. |
| current | The severity of an electric shock depends on the amount of __________. |
| decreases | The strength of the electric field of a charged particle becomes greater as the distance from the particle ____________. |
| law of conservaton of charge | The _________________________ states that charges is are not created or destroyed. |
| electric force | The attraction or repulsion between electrical charges is called _________________. |
| voltage sources | Batteries and generators are examples of ______________, which create a potential difference in a circuit. |
| ammeter | To measure the current through a device in an electric circuit, an ________ should be connected in series with the device. |
| current | The continuous flow of charges through a material is electric________. |
| energy | In a flashlight, the battery is a source of electrical ________. |
| attract | As in the case of unlike magnetic poles, unlike electric charges ______ each other. |
| static electricity | The buildup of electric charges on an object is called _________. |
| friction | Clothes in a dryer acquire static cling by ________. |
| static discharge | The loss of static electricity as electric charges move off an object is called ________________. |
| neutral | Suppose you acquire a positive charge from walking across a carpet. You then touch a doorknob and receive a shock. This leaves you electrically __________. |
| voltage | __________ causes charge to move in a circuit. |
| of the least resistance | An electric current will always follow the path______________________. |
| dimmer | In a series circuit with three bulbs, adding another bulb will make all the bulbs _________. |
| its own path | In a parallel circuit with three bulbs, current from each bulb has ______________. |
| voltmeter | a device used to measure electrical potential energy difference, or voltage, is called a __________. |
| short circuit | A connection that allows current to take the path of least resistance is called a ________________. |
| you cannot use it again | One disadvantage of using fuses when a fuse burns out, __________________. |
| cause burns and stop your heart | A current of greater than 0.2 amps could ___________________________. |
| positive | The charge on a proton is _________, and the charge on an electron is negative. |
| negative | The charge on a proton is positive, and the charge on an electron is __________. |
| electroscope | An instrument that can detect the presence of an electric charge is and ______________. |
| voltage source | A device that creates a potential difference in an electric circuit is a _________________. |
| electric circuit | A complete, unbroken path through which electric charges can flow is an _________________. |
| conductors | Materials that allow the charges of an electric current to move freely through them are called ____________. |
| rubber | An example of an unsulator is ____________. |
| switch | A device that used to open and close an electric circuit is a ___________. |
| electric current | The ampere is a unit of ____________. |
| electrochemical cell | A device that transforms stored chemical energy into electrical energy is and _________________. |
| terminals | The parts of the cell that are used to connect an electrochemical cell to a circuit are the _________. |
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