# P2 - Current through different circuits

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- Created by: chickpeatweet
- Created on: 06-05-14 18:22

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**Current and Potential Difference**

Circuit containing:

Current - measured by an ammeter - in series

Potential Difference - measured by a voltmeter - parallel

Fixed resistor - has a value that doesn't change

In this circuit the temperature is constant

**For this circuit, current is directly proportional to the potential difference - on a graph the line is a straight line**

To work out potential difference you use this equation:

**V = I x R**

**V - volts, I - amps, R - ohms**

**Current Through Lamps and Diodes**

Circuit containing a lamp

On a graph…

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