Question

Mark the correct reason/s why nichrome is used for making heating element of electrical appliances.

• A. Nichrome does not oxidize
• B. Nichrome doesn't burn easily at high temperatures as it has higher melting and boiling point than metals
• C. Nichrome has higher resisistivity and consequently a higher resistance
• D. All

Answer 1

Answer: (D)

All

Nichrome is used for making heating element of electrical appliances. Because nichrome does not oxidize and burn easily at high temperature i.e.it has higher melting and boiling point than metals. Thus it does not melt even when a large amount of heat is produced due to passage of current. Moreover, It has higher resisistivity and consequently a higher resistance.Therefore, it will resist the flow of charges more, and lead to development of heat faster.