A carbon resistor is to be used as a thermometer. On a winter day when the temperature is \( 4.00{ }^{\circ} \mathrm{C} \)
C , the resistance of the carbon resistor is 217.3 \Omega
\Omega
. What is the temperature on a spring day when the resistance is 215.4 IOmega
IOmega
?
Take the temperature coefficient of resistivity for carbon to be \alpha
\alpha
\[
=-5.00 \backslash \text { times } 10-4 \quad \mathrm{C}-1
\]
C
\( - \)
1