charge in circuits

• Electric charge


  Measured in coulombs (C)
• Current of 1 ampere

  1 Coulomb of charge flowing per second
• Electric current


  The rate of flow of electrical charge
• Calculating charge flow in a circuit

  Charge flow (C) = Current (A) x Time (s)
• Calculating charge flow

  • Given: Current = 0.3 A, Time = 20 s

  Charge flow = 0.3 A x 20 s = 6 C
• Calculating current

  • Given: Charge flow = 360 C, Time = 400 s

  Current = 360 C / 400 s = 0.9 A
• formula for charge:

  
  

  Q = I x t
• Q = charge flow (c)

  I = current (A)

  t = time (s)