# Electricity

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- Created by: Alys Phillips
- Created on: 05-04-15 11:46

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- Electricity
- Current
- Measured in amps
- an ammeter is connected in series

- series circuit
- Current is the same at all points in a circuit

- parralel circuit
- the current from the source is larger than the current in each branch
- the current from the source is the sum of the current in the seperate branches

- current is related to the flow of charge

- Measured in amps
- Voltage
- the potential difference across a component is measured in volts
- a voltmeter connects in parallel
- the sum of voltage across the components in a series circuit is equal to the total voltage across the supply

- Resistance
- R = V/I
- for a fixed resistance, increasing the resistance of a component will decrease the current in it
- the resistance of 2 resistors in parallel is less than that of either resistor by itself
- the longer the wire, the higher the resistance
- the fatter the wire, the lower the resistance
- measured in Ohms

- Current

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