Question 4:
Why are
coils of electric toasters and electric irons made of an alloy rather than a
pure metal?
Solution:
Coils of electric toasters and
electric irons made of an alloy rather than a pure metal because the
resistivity of an alloy is higher than the pure metal. Also at high
temperatures, the alloys do not melt easily.
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Good answer
ReplyDeleteGood answer
ReplyDeleteWhat is the point of having a higher resistivity?
ReplyDeleteFor 2 toasters one made of pure metal and another made up of alloy..both will hava the same potential diff. And hence by the formula of Power=V^2/R..the one made of alloy will produce lower heat...so what is the use of having a toaster or iron which will produce lower heat? It will reduce work efficiency...
higher resistivity h phir bhi wo kyu use hota
ReplyDeleteHigher resistivity makes the appliance shock proof.....
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