Electric circuits

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17 Terms

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cell and battery

provides energy for charge to move

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switch

closes or opens a circuit

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conductor

connects circuit elements

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bulb

glows when current flows through it

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resistor

resists the flow of charge

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voltmeter

measures potential difference

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Ammeter

measures the current in circuit

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electric current

the rate at which charge flows

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potential difference

energy transferred per unit charge

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resistance

the opposition of a conductor to the flow of current

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Ohms law

states that current in a conductor is directly proportional to the potential difference across it provided its temperature remains constant

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1 coulomb

amount of charge passing through a point in 1 second when current is 1 amp

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EMF

electromotive force

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EMF definition

the potential difference measured across the terminals of a battery when no current is flowing through the battery

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operating voltage

is the voltage measured across the terminals of a battery when current is flowing through the battery

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cell

single energy source

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terminal potential difference

voltage measured across the terminal of a battery when charges are flowing in the circuit