Current & Potential Difference

• current

  the flow of electrical charge
• the size of current is the rate of flow of charge
• current is measure in amps (A)
• equation for current

  Q = It
• potential difference

  the driving force pushing the charge around
• potential difference is also known as voltage
• potential difference is measure on volts (V)
• equation for voltage

  V = IR
• the current flowing through a component depends on the potential difference across it and the resistance of the component