circuits Flashcards

1
Q

what direction do electric currents flow i

A

to positive end from negative end

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2
Q

what do electrons do

A

electrons carry energy to components in the circuit

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3
Q

what happens when electron return to positive end

A

they’re carrying less energy than before

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4
Q

how does current flow in a series circuit

A

it can only flow in one path in a series circuit

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5
Q

what is electric current and what is it measured in

A

electric current is flow of electric charge around a circuit and is measured in amperes or amps

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6
Q

what is the rule of current in series circuits

A

current is same all the way around in series

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7
Q

what do parallel circuits have

A

parallel circuits have branches

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8
Q

what are currents in parallel circuits like

A

current splits
current in branches adds to total current leaving the cell

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9
Q

what does a pd of 1 volt tell us

A

a pd of 1 volt tells us 1j of energy is transferred for every coulomb of charge that is moving through the circuit

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10
Q

how is total pd in series circuit

A

pd adds up between components in circuits

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11
Q

how is pd in parallel circuits

A

pd is same across each branch

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12
Q

what is a battery

A

two or more cells connected together

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13
Q

what is electrical charge measured in and whats the equatio

A

coloumbs
Q=Ixt
charge = current x time

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14
Q

what is resistance

A

potential difference required to drive a current through a component

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15
Q

what is resistance equation

A

r=v/i

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16
Q
A