Physics Unit 2

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  • Created by: TS21
  • Created on: 20-04-15 19:37

Series and Parallel Circuits

SERIES:

  • Only one pathway the current can go 
  • The total resistance is the sum of all the individual resistors or components
  • The total potential difference of the cells is the sum of the individual cells
  • The potential difference of the supply is shared between the components
  • The current is the same through each component.

 

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Series and Parallel Circuits:

PARALLEL CIRCUIT: 

  • The potential difference across each component is the same
  • The current is different in different branches of the circuit
  • The total current through the whole circuit is the sum of the current through the separate components.
  • The higher the resistance, the lower the current.
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Resistance, Current and Potential Difference

As you increase the potential difference, the current increases too. 

  • WHEN TEMPERATURE IS CONSTANT
  • ACROSS A FIXED RESISTOR

The graph is directly proportional.

If the battery is flipped, there are negative readings at the voltmeter.

(http://www.passmyexams.co.uk/GCSE/physics/images/resistor_at_constant_temperature.jpg)

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