Energy
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10. Energy transformation

Figure 6.12 Energy transformaton: electrical energy to light and heat
The Law of conservation of energy states that energy is neither created nor destroyed.

Energy can be transformed from one form to another or can be transferred from one body to another, but the overall energy does remains the same.

For example, we put electrical energy into a bulb and the bulb produces light (which is the desired form of output from a bulb), but we also get heat from the bulb (undesired form of energy from an electric bulb).




Figure 6.13 Energy Flow Diagram for an Energy Conversion Device

Therefore, energy that flows into and out of any energy conversion device can be summarized in the diagram on the left.

A

L

C