Energy in appliances
Every appliance converts energy. Part of it is useful, the rest is mostly lost as heat. You learn to work out efficiency, power in watts and energy in kWh.
Why
Why does an old incandescent bulb get burning hot while an LED lamp hardly gets warm?
Your grandparents may still have an incandescent bulb. If you touch it after it has been on for an hour, you burn your fingers. You can almost just pick up an LED lamp that gives as much light.
Both lamps receive electrical energy, but they handle it very differently. The incandescent bulb mostly makes heat and only a little light. If you understand that difference, you can choose appliances that waste less energy and cost less.
Opening Kaft Plus…
Kaft Plus
The rest of “Energy in appliances” is in Kaft Plus
The learning path and the first 3 topics of Bout are free. Kaft Plus opens every topic and exercise.
Already have Kaft Plus? The same button signs you in and brings you straight back.