Charge in Circuits

• What is electrical charge measured in?

  Coulombs
• What does a current of 1 ampere represent?

  1 Coulomb of charge flowing per second
• How is the size of electric current defined?

  As the rate of flow of electrical charge
• What is the equation to calculate charge flow in a circuit?

  Charge flow = current × time
• What unit is used for current?

  Amperes
• If the current is 0.3 amperes and the time is 20 seconds, what is the charge flow?

  6 coulombs
• How do you rearrange the equation to calculate current?

  Current = charge flow / time
• If 360 coulombs of charge flows in 400 seconds, what is the current?

  0.9 amperes
• What is the relationship between current, charge flow, and time?

  • Charge flow (C) = Current (A) × Time (s)
  • Current (A) = Charge flow (C) / Time (s)