Amps, Volts, e Watts

Understanding Electrical Unidades

Learn Electrical Unidades

Amps, volts, e watts describe diferente aspects of electricity. Understanding their relationship helps you choose o right charger, size electrical circuits, e understand your electric bill.

O Three Unidades

Volts (V) - Electrical Pressão

  • Força esse pushes electrons through a circuit
  • Higher voltage = mais "push"
  • US household: 120V; Europe: 230V

Amps (A) - Electrical Flow

  • Amount of charge flowing per segundo
  • Higher amps = mais electrons moving
  • Household circuits: 15-20A

Watts (W) - Electrical Potência

  • Rate of energy use
  • Watts = Volts × Amps
  • 60W bulb uses 60 joules per segundo

Key Formulas

  • P = V × I (Potência = Tensão × Corrente)
  • V = I × R (Tensão = Corrente × Resistência)
  • P = I² × R (Potência = Corrente² × Resistência)
  • P = V² / R (Potência = Tensão² / Resistência)

Prático Examples

DeviceTensãoCorrentePotência
Phone charger5V2A10W
LED bulb120V0.08A10W
Microwave120V8.3A1000W
Space heater120V12.5A1500W

Conclusão

Volts measure electrical pressure, amps measure flow, e watts measure power. O fundamental relationship P = V × I connects them todos. Understanding estes unidades helps com everything from charging devices efficiently to sizing home electrical circuits safely.

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Amps, Volts, e Watts: Electrical Unidades Explained | YounitConverter