A) Copper
B) Invar
C) Magnesium
D) Nichrome
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The correct answer is D) Nichrome
A. Copper is a good conductor of electricity and is often used in electrical wiring and components, but it is not typically used as a heating element in electric stoves.
B. Invar is a nickel-iron alloy with a very low coefficient of thermal expansion. It is used in a variety of applications that require dimensional stability, such as clock pendulums and scientific instruments, but it is not typically used as a heating element in electric stoves.
C. Magnesium alloy is a mixture of magnesium with other metals such as aluminum, zinc, silicon, manganese, and zinc. It is used in products such as aerospace, automotive, and electronic parts, but it is not typically used as a heating element in electric stoves.
D. Nichrome (NiCr or nickel-chromium alloy) is commonly used as the heating element in electric stoves because it has a high resistance to oxidation and can withstand high temperatures. It is made by alloying nickel and chromium together, which creates a material that can resist corrosion and retain its strength at high temperatures.