2. What transformation of energy occurs when you tum on a lamp shade?
A. electrical ➤ sound energy
C. electrical ➤ chemical energy
B. electrical ➤ light ➤ heat energy
D. electrical ➤ mechanical energy
A. electrical ➤ sound energy
C. electrical ➤ chemical energy
B. electrical ➤ light ➤ heat energy
D. electrical ➤ mechanical energy
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Answer:
B. electrical ➤ light ➤ heat energy
It can only change its form. In the case of an electric bulb, the electrical energy is converted to light and heat. The amount of electrical energy put into a bulb = the amount of light energy (desirable form) plus the heat energy that comes out of the bulb (undesirable form).