Power of Components

• What is power in terms of energy transfer?

  Rate at which energy is transferred
• What is the unit of power?

  Watt
• How many Joules are transferred per second in one Watt?

  One Joule
• What does a potential difference of 10 volts indicate across a resistor?

  10 Joules of energy per Coulomb
• What does a current of 1 ampere signify?

  One Coulomb of charge flowing per second
• How can you calculate the power of a component?

  Power = Potential difference × Current
• What is the equation for calculating power?

  Power = Voltage × Current
• What is the power of a resistor with a potential difference of 50 volts and a current of 0.2 amp?

  10 Watts
• How do you calculate the power of resistor A in a series circuit?

  Power = Potential difference × Current
• What is the total potential difference across both resistors in series if the cell is 20 volts?

  20 volts
• What is the power of resistor A with a potential difference of 5 volts and a current of 0.5 amp?

  2.5 Watts
• How can you calculate power if you know the current and resistance of a component?

  Power = Current squared × Resistance
• What is the equation for calculating power using current and resistance?

  Power = Current² × Resistance
• What is the power of a resistor with a current of 0.4 amp and a resistance of 50 ohms?

  8 Watts
• What are the key concepts for calculating power in electrical circuits?

  • Power = Voltage × Current
  • Power = Current² × Resistance
  • Units: Power (Watts), Voltage (Volts), Current (Amperes), Resistance (Ohms)