Charge and Energy in Circuits

Charge in Circuits

Electrons travel around a circuit > electricity. Each electron carries energy with it. Each electron has a negative charge

Electrical charge is measured in coulomb, C. The amount of electrical charge that moves in a circuit depends on the current flow and how long it flows for.

charge (coulomb, C) = current (ampere, A) × time (second, s)

Energy in Circuits


  • Energy is the flow of energy around the circuit 
  • Measured in Joules


  • Voltage is the driving force that pushes electrons 
  • Symbol V
  • Measured in Volts (electrical pressure)

For a given amount of electrical charge that moves, the amount of energy transformed increases as the potential difference (voltage) increases.

energy transformed (joule, J) = potential difference (volt, V) × charge (coulomb, C)

sign up to revision world banner