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Electric Circuits

Vocabulary

TermDefinition
Ohm's Law (V=IR) direct relationship b/w voltage & current, inverse b/w resistance & current
Voltage (electric potential) causes charges to move to a lower potential energy; in units of Volts (V)
Voltmeter device that measures voltage
Current flow of charges through a conductor; in units of Amperes or Amps (A)
Ammeter device that measures electric current
Resistance prevents/slows the flow of current; in units of Ohms (Ω)
Power (P=IV) amount of energy transferred/converted per unit of time; in units of Watts (W) or kW
Ohmmeter device that measures resistance
Multimeter device that can measure voltage, current, and/or resistance
Battery provides a potential difference (voltage) between the positive and negative terminals in a circuit
Resistor anything in a circuit that slows the current down (ex: light bulb, motor, etc.)
Switch used to control/stop the electrical flow in a circuit
Electric Circuit complete path or loop for the electricity to return back to the battery/voltage source
Direct Current when current only flows in a single direction, from a battery
Alternating Current when current reverses direction many times a second, from electrical power generators and wall sockets
Series Circuit has only one path through the circuit, so the current is constant throughout
Parallel Circuit has multiple branches or pathways, so each resistor has the same voltage across them
Combination Circuit includes both series and parallel elements in the same circuit
Kilowatt Hours the product of the power of an appliance and time of use; in units of kWh
Fuse used in portable devices; has a small piece of wire that melts when the current gets too high
Circuit Breaker like switches that pop open when the current gets too high in household circuits
Short Circuit when current has little to no resistance in a circuit, it gets high enough to cause a fire
Magnitude size or quantity (number)
Created by: john_bailey720
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