ELECTRICAL ENERGY & CHARGE

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Electrical Energy and Charge

Calculating Charge

  • PD (basically voltage) carries a flow of charge through the appliance carried by electrons.
  • Coulomb (c) = amount of charge flowing through in 1 seconds per 1 amp. 
  • so:
  • CHARGE =    CURRENT x TIME
  •  (coulombs)      (amps)        (s) 
  • Q= I x T
  • Where:

Q= Charge in coulombs

I= current in Amps

T= time in seconds

Energy and Potential difference

  • When a resistor is connected to a battery:
  • electrons pass through the resistor because of the battery -->
  • each electron then repeatedly collides with the vibrating metal ions in the of the resistor --> and this transfers ENERGY to the RESISTOR.
  • because the resistor now has energy, the ions of

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