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Chapter 12: Problem 1705

Which of the following has negative temperature coefficient of resistance? (A) \(\mathrm{Fe}\) (B) \(\mathrm{C}\) (C) \(\mathrm{Mn}\) (D) Ag

Short Answer

Expert verified
Carbon (\(\mathrm{C}\)) has a negative temperature coefficient of resistance, meaning its resistance decreases as the temperature increases. Therefore, the correct answer is (B) Carbon.

Step by step solution

01

Option A: Iron (\(\mathrm{Fe}\))

Iron has a positive temperature coefficient of resistance, meaning that the resistance increases as the temperature increases. Therefore, Iron is not the correct answer.
02

Option B: Carbon (\(\mathrm{C}\))

Carbon is unique among the choices here because it has a negative temperature coefficient of resistance. As the temperature increases, its resistance decreases. Therefore, Carbon is the correct answer.
03

Option C: Manganese (\(\mathrm{Mn}\))

Manganese has a positive temperature coefficient of resistance, meaning that the resistance increases as the temperature increases. Therefore, Manganese is not the correct answer.
04

Option D: Silver (\(\mathrm{Ag}\))

Silver has a positive temperature coefficient of resistance, meaning that the resistance increases as the temperature increases. Therefore, Silver is not the correct answer. After evaluating each option, we can conclude that: Carbon (B) has a negative temperature coefficient of resistance and is the correct answer.

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