1. A given material has a resistance of 20 2 at room temperature (20°C) and 25 2 at a temperature of 85°C. a) Does the material have a positive or a negative temperature coefficient? Explain briefly. b) Determine the value of the temperature coefficient, a, at 20°C. c) Assuming the resistance versus temperature function to be linear, determine the expected resistance of the material at 0°C (the freezing point of water) and at 100°C (the boiling point of water).

1. A given material has a resistance of 20 2 at room temperature (20°C) and 25 2 at a temperature of 85°C. a) Does the material have a positive or a negative temperature coefficient? Explain briefly. b) Determine the value of the temperature coefficient, a, at 20°C. c) Assuming the resistance versus temperature function to be linear, determine the expected resistance of the material at 0°C (the freezing point of water) and at 100°C (the boiling point of water).

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.2P: The temperature dependence of resistance is also quantified by the relation R2=R1[ 1+(T2T1) ] where...

See similar textbooks

Similar questions

The temperature dependence of resistance is also quantified by the relation R2=R1[ 1+(T2T1) ] where R1 and R2 are the resistances at temperatures T1 and T2, respectively, and is known as the temperature coefficient of resistance. If a copper wire has a resistance of 55 at 20C, find the maximum permissible operating temperature of the wire if its resistance is to increase by at most 20. Take the temperature coefficient at 20C to be =0.00382.
P1.15. A copper wire has a diameter of 2.05 mm and carries a current of 15 A due solely to clectrons. (These values are common in residential wiring.) Each electron has a charge of -1.60 × 10-19 C. Assume that the free-electron (these are the electrons capable of moving through the copper) concentration in copper is 1029 electrons/m'. Find the average velocity of the electrons in the wire.
x59 med1.pdf 1. A given material has a resistance of 20 2 at room temperature (20°C) and 25 N at a temperature of 85°C. a) Docs the material have a positive or a negative temperature cocfficient? Explain briefly. h) Determine the value of the temperature coefficient, a, at 20°C. c) Assuming the resistance versus temperature function to be lincar, determine the expected resistance of the material at 0°C (the freezing point of water) and at 100°C (the boiling point of watcr). 2. Find the equivalent resistance Rab in the circuits of Figure below. Ž 102 60 2 30 2 bo- ww ww 202 3. The network of Figure below is the basic biasing arrangement for the field-effect transistor (FET), a device of increasing importance in electronic design. (Biasing simply means the application of de levels to establish a particular set of operating conditions.) Even though you may be unfamiliar with the FET, you can perform the following analysis using only the basic laws introduced in your lectures and the…
Identify elements that are in parallel a. in Figure P1.37, b. in Figure P1.43, c. in Figure P1.44.
A sample of wire (1 mm in diameter by 1 m in diameter) length) of an aluminum alloy (containing 1.2% Mn) is placed in an electrical circuit, as shown in the figure next to. A voltage drop of 432 mV is measured at wire length when it carries a 10 A current. Calculate the conductivity of this alloy.
A-How temperature affects the conductivity of conductive metals and how it affects semiconductors.semiconductors B-What is superconductivity, how does it relate to temperature? Some examples of superconductors.superconductors.
%A l ( M med1.pdf 1. A given material has a resistance of 20 Q at room temperature (20°C) and 25 2 at a temperature of 85°C. a) Does the material have a positive or a negative temperature coefficient? Explain briefly. b) Determine the value of the temperature coefficient, a, at 20°C. c) Assuming the resistance versus temperature function to be linear, determine the expected resistance of the material at 0°C (the freezing point of water) and at 100°C (the boiling point of water).
ZAIN IQ l.. med1.pdf 1. A given material has a resistance of 20 2 at room temperature (20°C) and 25 2 at a temperature of 85°C. a) Does the material have a positive or a negative temperature coefficient? Explain briefly. b) Determine the value of the temperature coefficient, a, at 20°C. c) Assuming the resistance versus temperature function to be linear, determine the expected resistance of the material at 0°C (the freezing point of water) and at 100°C (the boiling point of water). 2. Find the equivalent resistance Rab in the circuits of Figure below. a o 10Ω 60 2 30 2 bo ww 202 3. The network of Figure below is the basic biasing arrangement for the field-effect transistor (FET), a device of increasing importance in electronic design. (Biasing simply means the application of de levels to establish a particular set of operating conditions.) Even though you may be unfamiliar with the FET, you can perform the following analysis using only the basic laws introduced in your lectures and the…
Nichrome ribbon resistor elements each has a resistance of 1 ohm. The element is made from sheet of nichrome alloy, 0.025 cm think. If the width of the ribbon is 0.3cm, what length is required per element in cm? Assume specific resistance of nichrome alloy to be 109microOhm-cm.
A wire of 59 in length and 4 mm2 has a resistance of 0.94 ohms. A 110-m length of wire of the same material has a resistance of 3 at the same temperature. Find the radius of this wire. The final unit must be in millimeter, mm.
Q1. We have an aluminum alloy containing 2 at% Mg. The electrical resistivity of this material is measured as 8x10-6 ohm.cm at 673 K. a) Calculate the impurity resistivity contributions. b) Estimate the electrical resistivity of aluminum containing %5 at% Mg at 200 °C?
Using the idea of energy bands in solid materials, explain the characteristics of the followingmaterialsa) conductorsb) insulatorsc) semiconductors