11.4 Electric Power

• A device with a higher power rating consumes more electrical energy per unit time
• A device with a higher power rating consumes more electrical energy per unit time
• Electric Power (P) is the rate of energy conversion
• Current (I) is the rate of flow of electric charge
• The amount of current in a circuit is affected by the voltage and resistance
• Higher resistance in a circuit leads to lower current.


  True
• The watt is used to express the power rating of electrical devices.


  True
• Power is measured in watts, voltage in volts, and current in amperes.


  True
• What is the formula for electric power (P) in terms of voltage (V) and current (I)?

  P = VI
• In the formula P = VI, 'I' represents the current in amperes.
• Voltage is the electric potential difference between two points in a circuit.
• The formula for Ohm's law is I = V/R
• Current is the rate of flow of electric charge through a circuit, measured in amperes
• Current is the rate of flow of electric charge through a circuit, measured in amperes
• The SI unit for electric power is the watt
• The formula for electric power is P = VI
• Match the voltage, current, and power values:

  120 V, 5 A ↔️ 600 W

  240 V, 2 A ↔️ 480 W

  12 V, 10 A ↔️ 120 W
• How much electrical energy is consumed by a 100 W device operating for 60 seconds?

  6000 J
• How is power distributed in a series circuit?

  Proportionally to resistance
• In the formula P = VI, what does I represent?

  Current
• What is voltage measured in?

  Volts
• The electric power formula relates power (P) in watts (W) to voltage (V) in volts (V) and current (I) in amperes
• Higher voltage leads to more current
• Ohm's law states that current is directly proportional to voltage and inversely proportional to resistance.


  True
• One watt is equivalent to one joule per second
• In the formula E = P * t, energy (E) is measured in joules
• In parallel circuits, power is distributed equally among components if their resistances are equal
• Electric power is the rate at which electrical energy is converted into other forms of energy
• Match the electrical quantity with its unit:

  Power ↔️ Watts

  Voltage ↔️ Volts

  Current ↔️ Amperes

  Energy ↔️ Joules
• Electric power is the rate at which electrical energy is converted into other forms of energy


  True
• In the equation E = P * t, E is measured in joules
• Electric Power (P) is the rate at which electrical energy is converted into other forms of energy
• Electric power is measured in watts and calculated using the formula P = VI.


  True
• The formula P = IV shows the relationship between power, voltage, and current.


  True
• Match the electrical quantity with its description:

  Voltage ↔️ Electric potential difference

  Current ↔️ Flow of electric charge

  Power ↔️ Rate of energy conversion
• What does Ohm's law state about the relationship between voltage, current, and resistance?

  $I =$$\frac{V}{R}$
• Higher voltage leads to higher current in a circuit.


  True
• What is the SI unit for electric power?

  Watt (W)
• The formula for electric power is P = VI
• Order the examples of electric power from highest to lowest based on power rating:

  1️⃣ 120 V, 5 A, 600 W

  2️⃣ 240 V, 2 A, 480 W

  3️⃣ 12 V, 10 A, 120 W