An engineer needs a resistor with a zero overall temperature coefficient of resistance at 20.0C. She...

 

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An engineer needs a resistor with a zero overall temperature coefficient of resistance at 20.0°C. She designs a pair of circular cylinders, one of carbon and one of Nichrome as shown in the figure below. The device must have an overall resistance of R₁ + R₂ -13.00 independent of temperature and a uniform radius of r 2.50 mm. Ignore thermal expansion of the cylinders and assume both are always at the same temperature. (We call the carbon resistor 1 and the Nichrome resistor 2.) 4 42 (a) Can she meet the design goal with this method? Yes O No (b) If so, state what you can determine about the lengths L, and L₂ of each segment. (Enter NONE if there is no answer.) 4- m 4₂= m An engineer needs a resistor with a zero overall temperature coefficient of resistance at 20.0°C. She designs a pair of circular cylinders, one of carbon and one of Nichrome as shown in the figure below. The device must have an overall resistance of R₁ + R₂ -13.00 independent of temperature and a uniform radius of r 2.50 mm. Ignore thermal expansion of the cylinders and assume both are always at the same temperature. (We call the carbon resistor 1 and the Nichrome resistor 2.) 4 42 (a) Can she meet the design goal with this method? Yes O No (b) If so, state what you can determine about the lengths L, and L₂ of each segment. (Enter NONE if there is no answer.) 4- m 4₂= m

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User 15 mm instead of 21 mm used here every thing is same Let the temperature coef... View the full answer