How is electrical energy calculated?
1 Answer
Electrical energy is calculated using the formula:
Electrical Energy (E) = Power (P) × Time (t)
Where:
Electrical Energy (E) is measured in units like kilowatt-hours (kWh) or joules (J).
Power (P) is the electrical power consumption or generation rate, measured in watts (W) or kilowatts (kW).
Time (t) is the duration for which the power is consumed or generated, measured in hours (h).
The formula states that the electrical energy consumed or generated is equal to the power multiplied by the time for which that power is used or generated.
For example, if a device with a power rating of 100 watts (0.1 kilowatts) runs for 5 hours, the electrical energy consumed would be:
Electrical Energy (E) = 0.1 kW × 5 h = 0.5 kWh
Similarly, if you have a solar panel that generates 1 kilowatt of power for 3 hours, the electrical energy generated would be:
Electrical Energy (E) = 1 kW × 3 h = 3 kWh
It's essential to use consistent units when performing these calculations. If the power is given in watts, the time should be in hours, and if the power is in kilowatts, the time should be in kilowatt-hours.
Electrical Energy (E) = Power (P) × Time (t)
Where:
Electrical Energy (E) is measured in units like kilowatt-hours (kWh) or joules (J).
Power (P) is the electrical power consumption or generation rate, measured in watts (W) or kilowatts (kW).
Time (t) is the duration for which the power is consumed or generated, measured in hours (h).
The formula states that the electrical energy consumed or generated is equal to the power multiplied by the time for which that power is used or generated.
For example, if a device with a power rating of 100 watts (0.1 kilowatts) runs for 5 hours, the electrical energy consumed would be:
Electrical Energy (E) = 0.1 kW × 5 h = 0.5 kWh
Similarly, if you have a solar panel that generates 1 kilowatt of power for 3 hours, the electrical energy generated would be:
Electrical Energy (E) = 1 kW × 3 h = 3 kWh
It's essential to use consistent units when performing these calculations. If the power is given in watts, the time should be in hours, and if the power is in kilowatts, the time should be in kilowatt-hours.