Equations

• What is the purpose of rearranging equations?

  To make them easier to remember
• What does the formula for charge equal?

  Charge = Current x Time
• What does the formula for potential difference equal?

  Potential Difference = Current x Resistance
• What is the formula for voltage?

  Voltage = Current x Resistance
• What does energy transfer equal?

  Energy Transfer = Charge x Voltage
• What is the formula for energy in terms of power?

  Energy = Power x Time
• What is the formula for power in terms of voltage?

  Power = Current x Voltage
• What is the formula for power in terms of resistance?

  Power = Current² x Resistance
• What is the formula for power in terms of current?

  Power = Current² x Resistance
• What are the key variables in electrical equations?

  • Charge (C)
  • Current (I)
  • Voltage (V)
  • Resistance (R)
  • Power (P)
  • Energy (E)
  • Time (t)
• What is the unit for charge?

  Coulombs (C)
• What is the unit for current?

  Amperes (A)
• What is the unit for voltage?

  Volts (V)
• What is the unit for resistance?

  Ohms (Ω)
• What is the unit for power?

  Watts (W)
• What is the unit for energy?

  Joules (J)
• What is the unit for time?

  Seconds (s)
• What is the relationship between charge, current, and time?

  Charge equals current multiplied by time
• What is the relationship between voltage, current, and resistance?

  Voltage equals current multiplied by resistance
• What is the relationship between energy, charge, and voltage?

  Energy equals charge multiplied by voltage
• What is the relationship between power, current, and voltage?

  Power equals current multiplied by voltage
• What is the relationship between power, current, and resistance?

  Power equals current squared multiplied by resistance
• What is the relationship between energy, power, and time?

  Energy equals power multiplied by time