Multiple choice

Which alloy is used in making heating elements for electric heating devices?

  1. Nichrome

  2. Tungsten

  3. Iron

  4. Chromium
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A Correct answer
Explanation

Nichrome (nickel-chromium alloy) is the standard material for heating elements because it has high electrical resistance, can withstand temperatures over 1000°C without oxidizing, and maintains structural integrity when heated repeatedly. Tungsten has a very high melting point but is used in incandescent bulb filaments, not heating elements. Pure iron would oxidize and rust quickly at high temperatures. Chromium alone is not used for heating elements - it's the chromium in nichrome that provides corrosion resistance.

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