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Step-by-step explanation:
Which is thicker :-
1) Since , the resistance is same in both and length as well .
Also , resistivity of nichrome is
greater than that of copper .
→ The nichrome wire will be thicker .
Why allows are used in making heating devices :-
The resistance of alloy has high resistance Thus the collision between the charges flowing will be more leading to more production of heat energy .
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