Electrical Energy and Power: A Comprehensive Guide
Understanding Electrical Energy
Electrical energy, measured in kilowatt-hours (kWh), represents the rate at which electrical energy is transferred through an electric circuit.
The equation for electrical energy is expressed as:
Energy transferred in kWh = 1 kWh x 36 x 10^6 J
Units and Conversions
1 kilowatt-hour (kWh) = 3.6 x 10^6 joules (J)
Electrical Power
Definition and Formula
Electrical power, measured in watts (W), is the rate at which electrical energy is transferred. It is calculated using the following formula:
Electrical Power = Voltage (V) x Current (I)
where:
- Voltage (V) is the electrical potential difference between two points in a circuit, measured in volts (V).
- Current (I) is the flow of electrical charge through a circuit, measured in amperes (A).
Relationship Between Electrical Energy and Power
Formula
Electrical energy is related to electrical power through the following formula:
Electrical Energy = Electrical Power x Time
where:
- Time is the duration over which electrical energy is transferred, measured in seconds (s).
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