Circuit Concepts

• V = I x R
• Vout = (Vin x R2) / (R1 + R2)

  
• P = I x V
• Energy = Power x time
• In a parallel circuit, the voltage is equal across all components in parallel.
• In a series circuit, the sum of voltages around the circuit is equal to the voltage of the battery.
• In a series circuit, the current is equal at all points in the circuit.
• In a parallel circuit, the sum of the currents entering a junction is always equal to the sum of the currents leaving a junction.