# P2, Electrical Circuits

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• Created by: emmajane_
• Created on: 13-04-14 11:51
What is Potential difference and what i sit measured in?
It is the amount of joules per column of charge. Measured in volts (V)
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What is current and what is it measured in?
Current is the amount of charge per second passing a point in the circuit. Measured in amps (I)
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What is resistance and what is it measured in?
It is the ratio of potential difference across a component to the current flowing through it. Measured in Ohms
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What is current directly proportional to?
Potential difference
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What happens if you the double potential differene in a circuit?
The current also doubles, but the resistance remains the same
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What should you get if you plot a graph of potential difference and current?
You should get a straight line passing through the origin (0,0)
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What is Ohms law?
"The electrical current in a conductor is proportional to the potential difference applied to it, provided the temperature stays the same"
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What is the equation for Ohms law?
Potential difference= current x resistance
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What is current measured by in a circuit?
Measured by an ammeter, which is connected to a series
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What is Potential difference measured by in a circuit?
Measured using a voltmeter, which is connected in parallel
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What does measuring the current and potential difference allow you to do?
Calculate the resistance
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## Other cards in this set

### Card 2

#### Front

What is current and what is it measured in?

#### Back

Current is the amount of charge per second passing a point in the circuit. Measured in amps (I)

### Card 3

#### Front

What is resistance and what is it measured in?

### Card 4

#### Front

What is current directly proportional to?

### Card 5

#### Front

What happens if you the double potential differene in a circuit?