The nichrome heating element of a toaster has a resistance at 12Ω when it's red hot (1200°C). What's the resistance of the element at room temperature (27°C)? [temperature coefficient of resistance of nichrome is 0.4×10-3 °C-1]

A 8.167Ω

B 10.167Ω

C 9.167Ω

D 7.167Ω

Solution

Correct Answer: Option A

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