Electric calculations

• Current


  How much charge passes a point in a second
• Potential difference


  The difference in the amount of energy each electron is carrying
• Resistance


  How difficult it is for electrons to flow through a component
• Charge

  The property of an object that means it feels an electric force
• Power

  How quickly energy is transferred
• Energy


  The cumulative effect of a force doing work over a distance
• Amp


  Unit of Current
• Volt


  Unit of Potential Difference
• Ohm


  Unit of Resistance
• Coulomb

  Unit of Charge
• Watt


  Unit of Power
• Joule

  Unit of Energy
• Charge (Q) = Current x time
• Current = Charge / Time
• Power (P) = Voltage x current
• Energy (U) = Voltage x charge
• Energy = Power x time
• Power = Voltage x current
• Voltage (V) = Current x Resistance
• Resistance (R) = Voltage / Current
• Voltage = Current x Resistance