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Q.

Why does the cord of an electric heater not glow white the heating element does?

Tags: health, science, religion & spirituality
Asked by poonam admane, 25 Jun '13 04:07 pm
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Answers (4)

 
1.

Heating element has the elements required for them to excite and then radiate eficiently :)
Answered by conviction, 25 Jun '13 04:09 pm

 
  
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2.

Cord is made of bad conductor of heat.
Answered by rk, 25 Jun '13 04:10 pm

 
  
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3.

Heating element has the elements required for them to excite and then radiate eficiently
Answered by Quest, 26 Jun '13 02:29 pm

 
  
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4.

A typical heating element is usually a coil, ribbon, of strip of wire made from nichrome that gives off heat much like a lamp filament. When an electric current flows through it, it glows red hot and converts the electrical energy passing through it into heat, which it radiates out in all directions. Nichrome is an alloy (a mixture of metals and sometimes other chemical elements) that consists of about 80 percent nickel and 20 percent chromium (other compositions of nichrome are available, but the 8020 mix is the most common). There are various good reasons why nichrome is the most popular material for heating elements: it has a high melting point (about 1400C or 2550F), doesn't oxidize (even at high temperatures), doesn't expand too much when it heats up, and has a reasonable (not too low, not too high, and reasonably constant) resistance (it increases only by about 10 percent between room temperature and its maximum operatin
Answered by ajay, 25 Jun '13 04:14 pm

 
  
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