Why a copper wire in a closed circuit does not get hot , but the nichrome wire does ?
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Answer:
This happens because copper wire has a lower resistivity as compared to nichrome wire.
Explanation:
Resistivity of a metal (or alloy) is the resistance of the wire of the same material as the metal whose length is 1 m and area of cross section is 1 sq m.
Resistance is the ability of a metal to resist the flow of charge through it.
A nichrome wire has a high resistivity and therefore a high resistance than a copper wire. So, when the ions move, they collide with each other and with other particles around them to produce heat.
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