Question

Mark the correct reasons 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 resistivity and consequently a higher resistance
• D. all of these

Answer 1

The correct option is D

all of these

The explanation for Correct Option:

Option (A):

1. Nichrome forms an oxide layer that is responsible for protecting the metal from any sort of corrosion.
2. Hence, nichrome does not oxidize.

Option (B):

1. Even when a large amount of heat energy is produced when the current is passed, nichrome does not melt.
2. This is because nichrome has a high melting and boiling point.
3. Hence, nichrome doesn’t burn easily at high temperatures.

Option (C):

1. Nichrome wire is used as a heating element since it doesn't burn easily even at high temperatures.
2. Therefore, in order to reach such high temperatures, nichrome produces a high resistance.
3. So, nichrome has a high resistivity.
4. Hence, nichrome has higher resistivity and consequently a higher resistance.

Option (D):

1. Since all the above options are correct, “all of these” is the correct option.