Question: Many laptop power cords include box - shaped transformers that change the energy in the wall outlet into a form that is compatible with the

Many laptop power cords include box

-

shaped transformers that change the energy in the wall outlet into a form that is compatible with the laptop. Why do these transformers become warm when the laptop is plugged in

?

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Warm transformers are an optional feature provided by manufacturers to let users know that the transformer is working.

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In any energy transformation, some of the usable energy is lost to less usable forms, in this case, heat.

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The heat acts as power storage to protect against brief power outages.

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Transformers protect your laptop from energy fluctuations by converting power surges to harmless heat.

Many laptop power cords include box - shaped

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