electricity 1 Flashcards by sally dolman

Q

what do electrons do in a circuit?

A

move constantly, carrying energy

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Q

what does a cell/battery do?

A

pushes electrons around a full circuit

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Q

what does a switch do?

A

enables the current to be switched off

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Q

what does a diode do?

A

allows current through 1 direction

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Q

what does an ammeter do?

A

used to measure electric current

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Q

what does a fixed resistor do?

A

limits current

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Q

what does a voltmeter do?

A

used to measure potential difference

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Q

what does a heater do?

A

transfers energy

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Q

what does a fuse do?

A

breaks the circuit

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Q

what does a variable resistor do?

A

controls current and voltage levels.

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Q

what is resistance?

A

the measure of how hard it is for charge to flow around an electrical circuit

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Q

what is resistance measured in?

A

ohms

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Q

what is current measured in?

A

amps

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Q

what is potential difference measured in?

A

volts

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Q

what is current?

A

the measure of how fast the electrons flow

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