Why is nichrome used in electric heating devices?

Options

  • A. It has relatively high resistance and high melting point
  • B. It is a perfect insulator
  • C. It has very low resistance
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

A. It has relatively high resistance and high melting point

Detailed Explanation

Nichrome has relatively high electrical resistance and a high melting point, making it suitable for heating elements. When current flows through resistance, heat is produced according to Joule’s law of heating: H = I²Rt. Nichrome also resists oxidation at high temperatures, increasing the durability of heating appliances.