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20 Cards in this Set
- Front
- Back
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Electric Charge |
Electric charge is a physical property of particles or objects that causes them to attract or repel each other without touching. |
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Electric Field |
An electric field is a space around a charged particle where the particle exerts electric force on other particles. |
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Electric Force |
Electric force is the force of attraction or repulsion between charged particles. |
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Law of Conservation of Charge |
The law of conservation of charge is, in all cases, the total charge remains the same. Electrons move, but they aren’t destroyed. |
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Static Discharge |
Static discharge is the sudden flow of electrons. ex; lightning |
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Static Electricity |
Static electricity is the buildup of charges. |
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Alternating Current (AC) |
When current keeps reversing direction, it is called alternating current (AC). |
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Direct Current (DC) |
When current flows in just one direction, it is called direct current (DC). |
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Electric Conductor |
Materials that have low resistance to electric current are called electric conductors. Many metals—including copper, aluminum, and steel—are good conductors of electricity. |
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Electric Current |
Electric current is a continuous flow of electric charges. |
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Electric Insulator |
Materials that have high resistance to electric current are called electric insulators. Wood, rubber, dry air, and plastic are examples of electric insulators. |
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Ohm’s law |
Relationships between current, voltage, and resistance. Current (amps)=Voltage (volts)/Resistance (ohms |
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Resistance |
Resistance is opposition to the flow of electric charges that occurs when electric current travels through matter. Resistance is caused by electrons in a current bumping into electrons and ions. |
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Voltage |
The difference in electric potential energy is called potential difference, or voltage. Voltage is measured in an SI unit called the volt (V). |
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Electric Circuit |
A closed loop through which current can flow is called an electric circuit. |
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Electric Power |
The rate at which a device changes electric current to another form of energy is called electric power. The SI unit of power is watt. Power (watts)=Current (amps)×Voltage (volts) |
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Parallel Circuit |
A parallel circuit has two (or more) loops through which current can flow. If the circuit is interrupted in one of the loops, current can still flow through the other loop(s). |
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Series Circuit |
A series circuit has only one loop through which current can flow. If the circuit is interrupted at any point in the loop, no current can flow through the circuit and no devices in the circuit will work. |
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Electronics |
Electric devices, such as lights and household appliances, change electric current to other forms of energy. The use of electric current for this purpose is called electronics. |
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Semiconductor |
A semiconductor is a solid crystal—usually consisting mainly of silicon—that can conduct current better than an electric insulator but not as well as an electric conductor. |
