2.4.1 Power

• What is the formula for power in terms of energy and time?

  $P =$$\frac{E}{t}$
• What is the alternative formula for power using voltage and current?

  $P =$$IV$
• 1 watt is equivalent to 1 joule of energy converted per second.

  True
• In the formula $P =$$\frac{E}{t}$, 't' represents the time
• What does 'V' represent in the formula $P =$$VI$?


  Voltage
• What is the unit of power in the SI system?

  Watt
• The formula $P =$$\frac{E}{t}$ relates power to energy and time
• The formula $P =$$VI$ is more direct for measuring energy use over time.


  False
• Power is the rate at which electrical energy is converted into other forms of energy
• The SI unit of power is the watt (W).

  True
• Power can be calculated using energy and time
• What does 'E' represent in the formula $P =$$\frac{E}{t}$?


  Energy
• The formula $P =$$VI$ relates power to voltage and current.


  True
• In the formula $P =$$VI$, 'I' represents the current
• The formula $P =$$\frac{E}{t}$ calculates power directly from energy and time.


  True
• If an appliance uses 600 joules of energy in 10 seconds, what is its power?

  60 watts
• If an appliance uses 600 joules of energy in 10 seconds, its power is 60
• Power is the rate at which electrical energy is converted into other forms, such as heat, light, or kinetic energy.
• If an appliance uses 600 joules of energy in 10 seconds, its power is 60 watts.

  True
• Power is measured in watts (W), where 1 watt equals 1 joule per second.
• 1 watt (W) equals 1 joule (J) of energy converted per second.
• Match the quantity with its unit and symbol:

  Power ↔️ Watt (W)

  Energy ↔️ Joule (J)

  Time ↔️ Second (s)
• In the formula $P =$$\frac{E}{t}$, 'E' represents the energy converted in joules.
• What is the formula for power in terms of voltage and current?

  $P =$$V \times I$
• The formula $P =$$\frac{E}{t}$ calculates power using energy and time, while $P =$$V \times I$ uses voltage and current.


  True
• What is the definition of a joule?

  Work done or heat generated
• 1 watt is equal to 1 joule of energy converted per second.


  True
• Power can also be calculated using the formula $P =$$IV$, where 'I' represents the current in amperes.
• The formula $P =$$IV$ is used when voltage and current are known, instead of energy and time.


  True
• In the formula P = IV, P is measured in watts.


  True
• If a device operates at 120 volts and draws 5 amperes of current, its power is 600
• The power formula using voltage and current is P = V × I
• Power is directly proportional to both voltage and current.


  True
• What is the formula for calculating power using energy and time?

  $P =$$\frac{E}{t}$
• An appliance using 600 joules of energy in 10 seconds has a power of 60 watts.


  True
• The formula $P =$$\frac{E}{t}$ calculates power directly from energy and time
• What are the units of energy and time in the formula $P =$$\frac{E}{t}$?


  Joules (J) and seconds (s)
• What is power measured in?

  Watts
• An appliance that uses 600 joules of energy in 10 seconds has a power of 60 watts.


  True
• A second is the base unit for time