Circuits

• Charge = Current x Time

  Q = It

  C = A x s
• Energy = Charge x Voltage

  E = QV

  J = C x V
• An ammeter measures the current
• A voltmeter measures the voltage
• Voltage = Current x Resistance

  V = IR

  V = A x Ω
• In Series Circuits:

  • Voltage is shared
  • Current is the same at all points
  • Resistance adds up

  
• In Parallel Circuits:

  • Voltage is the same at all points
  • Current is shared
• Energy = Power x Time

  E = Pt

  J = W x s
• Power = Current x Voltage

  P = IV

  W = A x V