व्हाई डू वी यूज नाइक्रोम इन एन इलेक्ट्रिक हिटर
Answers
Answer:
Common misconception: ‘Nichrome wire has relatively high resistivity and therefore generates more heat.’
Actually a smaller resistance will generate more heat and of course the formula heat=i².r.t does not hold here because 'i' or current is not constant, rather than the supply voltage V ( for instance V= 220 volts) is constant. Therefore a better formula will be heat=V².t/r
Now if that's the case then why not to use Copper in the heater. Of course this will be great but Copper is too good for this job, it will generate huge amount of heat and most probably will burn itself along with the heater, breaker will pop and it may kill the fuse as well. Thus to generate little less heat, lots and lots of Copper will be required to have large enough resistance to prevent it from damaging things. Or why not to use something that inherently have large resistance and better stability at higher temperatures ( higher melting point, small expansion when heated and prevention from oxidation burning). There comes the nichrome wire. Even a small amount of nichrome wire to fit into the housing of heater will do the job.
Explanation:
I hope it helps you