# Current, Potential Difference and Resistance

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Define Current
The rate of flow of charge
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What is current measured in
Ampere, Amps, A
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Symbol for Charge, Current and Time
Charge- Q Current- I Time- t
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What unit is Charge measured in and define it
Coulombs, C, is the amount of charge that passes in 1 second when the current is 1 amp.
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Equation for current, charge & time
Q=It
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Define Potential Difference/p.d/Voltage
is the energy per unit of charge
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What unit is Potential Difference/p.d/Voltage measured in and define it
Volt, V, the p.d across a component is 1 volt when you convert 1 J of energy moving 1 C of charge through the component (1V=1JC^-1)
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Equation for Voltage(V), Energy(W) and Charge(Q)
V=W/Q
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What has resistance?
Everything
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Define Resistance, R
R=V/I
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What unit is resistance measured in?
Ohms, Ω
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## Other cards in this set

### Card 2

#### Front

What is current measured in

Ampere, Amps, A

### Card 3

#### Front

Symbol for Charge, Current and Time

#### Back ### Card 4

#### Front

What unit is Charge measured in and define it

#### Back ### Card 5

#### Front

Equation for current, charge & time

#### Back 