monkeyDAce
Answered

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A certain copper winding has a resistance of 0.25ohm at a temperature of 18° Calculate the temperature rise in the winding when, after a period of operation, the resistance increases to 0.31ohm. The temperature coefficient of resistance of copper is 4.4 x 10-3 /°C

Sagot :

ladoresdominique

Answer:

13. A coil of wire has a resistance of 38.0 Ω at 25 �C and 43.7 Ω at 55 �C. What is the temperature coefficient of resistivity?

13. A coil of wire has a resistance of 38.0 Ω at 25 �C and 43.7 Ω at 55 �C. What is the temperature coefficient of resistivity? 

13. A coil of wire has a resistance of 38.0 Ω at 25 �C and 43.7 Ω at 55 �C. What is the temperature coefficient of resistivity? Resistance with temperature dependence is found from using temperature dependence of the resistivity.

13. A coil of wire has a resistance of 38.0 Ω at 25 �C and 43.7 Ω at 55 �C. What is the temperature coefficient of resistivity? Resistance with temperature dependence is found from using temperature dependence of the resistivity.

13. A coil of wire has a resistance of 38.0 Ω at 25 �C and 43.7 Ω at 55 �C. What is the temperature coefficient of resistivity? Resistance with temperature dependence is found from using temperature dependence of the resistivity. 

13. A coil of wire has a resistance of 38.0 Ω at 25 �C and 43.7 Ω at 55 �C. What is the temperature coefficient of resistivity? Resistance with temperature dependence is found from using temperature dependence of the resistivity. Usually the reference temperature is 20 �C, ρ0 is the resistivity at 20 �C, but it can be any temperature you know the resistivity at.

13. A coil of wire has a resistance of 38.0 Ω at 25 �C and 43.7 Ω at 55 �C. What is the temperature coefficient of resistivity? Resistance with temperature dependence is found from using temperature dependence of the resistivity. Usually the reference temperature is 20 �C, ρ0 is the resistivity at 20 �C, but it can be any temperature you know the resistivity at. 

13. A coil of wire has a resistance of 38.0 Ω at 25 �C and 43.7 Ω at 55 �C. What is the temperature coefficient of resistivity? Resistance with temperature dependence is found from using temperature dependence of the resistivity. Usually the reference temperature is 20 �C, ρ0 is the resistivity at 20 �C, but it can be any temperature you know the resistivity at. 

13. A coil of wire has a resistance of 38.0 Ω at 25 �C and 43.7 Ω at 55 �C. What is the temperature coefficient of resistivity? Resistance with temperature dependence is found from using temperature dependence of the resistivity. Usually the reference temperature is 20 �C, ρ0 is the resistivity at 20 �C, but it can be any temperature you know the resistivity at.  

13. A coil of wire has a resistance of 38.0 Ω at 25 �C and 43.7 Ω at 55 �C. What is the temperature coefficient of resistivity? Resistance with temperature dependence is found from using temperature dependence of the resistivity. Usually the reference temperature is 20 �C, ρ0 is the resistivity at 20 �C, but it can be any temperature you know the resistivity at.  

13. A coil of wire has a resistance of 38.0 Ω at 25 �C and 43.7 Ω at 55 �C. What is the temperature coefficient of resistivity? Resistance with temperature dependence is found from using temperature dependence of the resistivity. Usually the reference temperature is 20 �C, ρ0 is the resistivity at 20 �C, but it can be any temperature you know the resistivity at.   

13. A coil of wire has a resistance of 38.0 Ω at 25 �C and 43.7 Ω at 55 �C. What is the temperature coefficient of resistivity? Resistance with temperature dependence is found from using temperature dependence of the resistivity. Usually the reference temperature is 20 �C, ρ0 is the resistivity at 20 �C, but it can be any temperature you know the resistivity at.   

13. A coil of wire has a resistance of 38.0 Ω at 25 �C and 43.7 Ω at 55 �C. What is the temperature coefficient of resistivity? Resistance with temperature dependence is found from using temperature dependence of the resistivity. Usually the reference temperature is 20 �C, ρ0 is the resistivity at 20 �C, but it can be any temperature you know the resistivity at.    

13. A coil of wire has a resistance of 38.0 Ω at 25 �C and 43.7 Ω at 55 �C. What is the temperature coefficient of resistivity? Resistance with temperature dependence is found from using temperature dependence of the resistivity. Usually the reference temperature is 20 �C, ρ0 is the resistivity at 20 �C, but it can be any temperature you know the resistivity at.    Again, we need to know what the resistance R0 is at the reference temperature T0.� Here we can use the 25 �C as our reference temperature.� Since we know RT, R0, T, and T0� we can solve for a

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