Electrical Energy
- Created by: Nikesha Patel
- Created on: 22-05-13 17:49
Fullscreen
Energy is transferred=Power X Time
- The total energy transferred by an appliance can be found using this equation:
- Energy Transferred (in joules)=Power (in W) X Time (in s)
- Example: How much energy is transferred by a 2500 W kettle left on for 300 s?
- Answer: Energy=Power X Time = 2500 W X 300 s=750 000 J
Kilowatt-hours (kWh) are "UNITS" of energy
- Energy is usually measured in joules J
- But one joule is a tiny amount of electrical energy
- So your electricity meter records how much energy you use in units of kilowatt-hours, or kWh
- A kilowatt-hour…
Comments
No comments have yet been made