Which energy conversion takes place when a solar cell is used to light a street lamp?
a) solar energy → light energy
b) solar energy → electric energy → light and heat energy
c) solar energy → light and heat energy
d) heat energy → light energy
e) heat energy → light energy → electric energy
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Ответ:
Solar energy charges the battery or cell; it is then powered through the wires and light comes and heat.
But if the lamp they are talking about doesn't have wire the choose C.
But I am certain it is B
Ответ:
Answer;
B) solar energy → electric energy → light and heat energy
Explanation;
- From the law of conservation of energy, energy can never be created or destroyed, however energy may be converted from one form to another. The devices that transform energy from one form to another are called transducers, such as solar cell, generator, street lam, light bulb, etc.
-Solar cells also called the photovoltaic cells are devices that transform light energy directly into electrical energy.
-A street lamp on the other hand converts electrical energy into heat and light energy.
Ответ:
The role of a hypothesis is to give us an idea of what might happen, and if it is right then great, and if it is not then that's fine too because that means it gave us a chance to learn from it and therefore improve our understanding.
Explanation:
yup