module 7 (electricity) Flashcards

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1
Q

define current

A

how quickly the electrons flow through the wires

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2
Q

define electrical current

A

a flow of charged particles

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3
Q

what is electrical current measured in?

A

amps

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4
Q

what is needed in a circuit?

A

an energy supply, a component, a complete loop made of a connector

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5
Q

how does a fuse work?

A

if too much current flows through, the fuse heats up, melting the fuse wire and breaking the circuit

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6
Q

define a series circuit

A

a circuit where all the components are connected next to each other in one single loop

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7
Q

define a parallel circuit

A

a circuit where the components are connected in several loops

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8
Q

define potential difference (voltage)

A

the energy carried by electrons through a circuit

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9
Q

what does a cell (battery) consist of

A

two different metals, suspended in acidic solution

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10
Q

define resistance

A

a measure of the opposition to current flow in an electrical circuit

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11
Q

what is resistance measured in?

A

ohms ( Ω )

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12
Q

how do you calculate resistance?

A

resistance = potential difference (voltage) / current

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13
Q

define circuit

A

a complete path which electrical energy can flow through

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