Question

what would happen if we replaced the wire in a fuse with thick copper wire?

Answer 1

it will get melted inside and may get the glass broke because copper can't stand with high electric you can replace to by tungsten and nickrome if you want to

Answer 2

Hi bro,

If the wire inside the fuse (i.e. Tungsten Or Nickrome) is replaced with thick Copper (Cu) wire, it will melt inside and the Glass may break.
Because Copper cannot withstand the high electric current.

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Regards,
Harith
Virtuoso