ZuoTi.Pro
Question

For some applications, it is important that the value of a resistance not change with temperature....

For some applications, it is important that the value of a resistance not change with temperature. For example, suppose you made a 9 kΩ resistor from a carbon resistor and a Nichrome wire-wound resistor connected together so the total resistance is the sum of their separate resistances. The temperature coefficients of resistivity of carbon and Nichrome at 20∘C are -0.0005 (∘C)−1 and 0.0004 (∘C)−1, respectively.

Express your answer to one significant figure and include the appropriate units.

a.) What value should the carbon resistor have (at 20∘C∘C) so that the combination is temperature independent?

b.) What value should the Nichrome wire-wound resistor have (at 20 ∘C∘C) so that the combination is temperature independent?

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
For some applications, it is important that the value of a resistance not change with temperature....
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • A length of aluminum wire is connected to a precision 10.00-V power supply, and a current...

    A length of aluminum wire is connected to a precision 10.00-V power supply, and a current of 0.4212 A is precisely measured at 27.0 ∘C. The wire is placed in a new environment of unknown temperature where the measured current is 0.3804 A . --------------------------------------------------------------------------------------------------------------------------------------------------- For some applications, it is important that the value of a resistance not change with temperature. For example, suppose you made a 4.00 −kΩ−kΩ resistor from a carbon resistor and a Nichrome wire-wound resistor connected...

  • A carbon wire and a Nichrome wire are connected one after the other. If the combination...

    A carbon wire and a Nichrome wire are connected one after the other. If the combination has total resistance of 7.0 k at 20°C, what is the resistance of each wire at 20°C so that the resistance of the combination does not change with temperature?Nichrome wire kcarbon wire k Please answer correctly for a thumbs up??

  • 5. An electric heater has a Nichrome heating element with a resistance of 9 Ω at...

    5. An electric heater has a Nichrome heating element with a resistance of 9 Ω at 20°C. When l 16 V are applied, the electric current heats the Nichrome wire to 1060 C What is the operating wattage of this heater? The temperature coefficient of resistivity of Nichrome is α-0.0004 C Watts

  • stuck on these 2 questions 1. A resistor made of Nichrome wire is used in an...

    stuck on these 2 questions 1. A resistor made of Nichrome wire is used in an application where its resistance cannot change more than 2.53% from its value at 20.0°C. What is the highest temperature at which this resistor can be reliably used? The temperature coefficient of resistivity for Nichrome is 0.4 ✕ 10−3 (°C)−1. 2. An electronic device designed to operate at any temperature in the range from −9.9°C to 78.7°C contains pure carbon resistors. What is the percent...

  • An 80 cm long wire is made by welding a 1.8 mm diameter, 20 cm long...

    An 80 cm long wire is made by welding a 1.8 mm diameter, 20 cm long copper wire to a 1.8 mm diameter, 60 cm long iron wire at normal room temperature (20 ∘C). When two wires are connected end to end, their resistances add together. The resistivity of copper is 1.68×10−8Ωm and the of iron is 1.00×10−7Ωm. The temperature coefficients are: copper = 0.0039/∘C and iron = 0.0050/∘C. What is the resistance of the iron section of wire?

  • An 80 cm long wire is made by welding a 1.8 mm diameter, 20 cm long...

    An 80 cm long wire is made by welding a 1.8 mm diameter, 20 cm long copper wire to a 1.8 mm diameter, 60 cm long iron wire at normal room temperature (20 ∘C). When two wires are connected end to end, their resistances add together. The resistivity of copper is 1.68×10−8Ωm and the of iron is 1.00×10−7Ωm. The temperature coefficients are: copper = 0.0039/∘C and iron = 0.0050/∘C. What is the resistance of the copper section of wire?

  • 5. What correctly relates the concept of resistivity to resistance? A) Increase in density means an...

    5. What correctly relates the concept of resistivity to resistance? A) Increase in density means an increase in resistivity causing an increase in resistance B) Decrease in temperature means an increase in resistivity causing an increase in resistance C) Decrease in density means an increase in resistivity causing an increase in resistance D) Increase in temperature means an increase in resistivity causing an increase in resistance 5.1 What would have an effect on the resistance of a conducting wire? E)...

  • A resistor made of Nichrome wire is used in an application where its resistance cannot change...

    A resistor made of Nichrome wire is used in an application where its resistance cannot change more than 1.05% from its value at 20.0°C. Over what temperature range can it be used in °C)? lowest temperature °C highest temperature oC

  • A resistor made of Nichrome wire is used in an application where its resistance cannot change...

    A resistor made of Nichrome wire is used in an application where its resistance cannot change more than 1.30% from its value at 20.0°C. Over what temperature range (in oC) can it be used? Enter the smaller value in the first box. From -57.5 degC to 97.5 degc Submit Answer Incorrect. Tries 1/10 Previous Tries

  • 3 WA 017 A copper wire has a resistance of 0.455 2 at 20.0°C, and an...

    3 WA 017 A copper wire has a resistance of 0.455 2 at 20.0°C, and an iron wire has a resistance of 0.494 n at the same temperature. At what temperature are their resistances equal? The temperature coefficient of resistivity for copper is 3.90 x 10 (oc) and for iron it is 5.00 x 10 (Pc)- -34 What is the expression that gives the temperature dependence of resistance? Both materials go through the same temperature difference. How can you use...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT