Charge and Current

• Current is the rate of flow of charge measured in amps (A)
• Charge (Q) = current (I) x time (t)
• Convection current is the flow of charge from the positive side of the battery to the negative side.

  Electron flow is the movement of electrons from the negative side of the battery to the positive side
• Current (I) = cross sectional area (A) x density (n) x elementary charge (e) x mean drift velocity (v)
• Kirchhoffs first law deals with electrical current. For any point in an electrical circuit, the sum of currents into a point is equal to the sum of currents out of that point. Conservation of charge
• Number of electrons = total charge/elementary charge