❓ why
Why does electric current produce heat in wires?
Quick Answer
Current produces heat because moving electrons collide with atoms in the material and lose energy. That energy becomes thermal motion, which is called electrical resistance heating.
The Full Story
When electrons flow through a wire, they do not move completely freely; they scatter off atoms, impurities, and defects. Each collision transfers some energy to the atomic lattice, increasing vibration and raising the temperature. This is why toaster coils, electric heaters, and incandescent filaments get hot. The effect was studied in the 19th century and is often described by Joule’s law.
Key Facts
1.Heat from current is due to electrical resistance
2.The effect is commonly called Joule heating
3.Incandescent bulbs work because the filament gets extremely hot
YouTube Angle
Suggested video title for this topic:
"Why do wires heat up when electricity flows through them?"
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