A Heating Element Made of Nichrome Wire (Temperature Coefficient of Resistivity

question 85

Multiple Choice

A heating element made of nichrome wire (temperature coefficient of resistivity, $\alpha$ = 0.400 $\times$ 10^-3 K^-1) is connected to a source.When it has just been turned on and its temperature is 20ºC,it dissipates 960 W of power.What power is dissipated when its temperature has risen to 300ºC?

• A)1.1 \(\times\) 10³ W
• B)9.6 \(\times\) 10² W
• C)8.6 \(\times\) 10² W
• D)8.6 \(\times\) 10³ W
• E)1.1 \(\times\) 10² W

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