Physics
Grade-7
Easy
Question
Nichrome is used as a coil of heater because
- High resistance and low melting point
- It has high resistance and high melting point
- Low resistance and high melting point
- None of the above
Hint:
It has high resistance and high melting point
The correct answer is: It has high resistance and high melting point
When an electric current passes through the nichrome, it produces a lot of heat due to its high resistance. It has also high melting point so it does not melt even though the amount of heat generated is large. Due to the above reasons, it is used in the coils of a heater.
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