The resistivity of a metal increases slightly with increased temperature. This can be expressed as p=po [1+ a(T-To)], where To is a reference temperature, usually 20° C, and a is the temperature coefficient of resistivity. For copper, a=3.9x 10-3 °C-¹. Suppose a long, thin copper wire has a resistance of 0.25 at 20°C. ▼ Part A At what temperature, in °C, will its resistance be 0.25 ? T = Submit VE ΑΣΦ Request Answer ? °C

The resistivity of a metal increases slightly with increased temperature. This can be expressed as p=po [1+ a(T-To)], where To is a reference temperature, usually 20° C, and a is the temperature coefficient of resistivity. For copper, a=3.9x 10-3 °C-¹. Suppose a long, thin copper wire has a resistance of 0.25 at 20°C. ▼ Part A At what temperature, in °C, will its resistance be 0.25 ? T = Submit VE ΑΣΦ Request Answer ? °C

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 46P: An electronic device designed to operate at any temperature in the range from 10.0C to 55.0C...

See similar textbooks

Similar questions

An electronic device designed to operate at any temperature in the range from 10.0C to 55.0C contains pure carbon resistors. By what factor does their resistance increase over this range?
A wire 3.00 m long and 0.450 mm2 in cross-sectional area has a resistance of 41.0 Ω at 20°C. If its resistance increases to 41.4 Ω at 29.0°C, what is the temperature coefficient of resistivity?
Calculate the specific conductivity of the conductor in Mega(Ωm)-1 since the current passing through a conductor with a cross-section (1.00nm x 1.00µm), length of 10.00mm, is 1.00mA and the voltage value falling on it is 1.00V.
If you know that the work function of tungsten is(4.5ev) , find: a- Emitter constant (b) for tungsten. b- The value of the constant A at a temperature of (27270 °C ) if you know that the density of the current passing through is (J=15 A/m?).
Consider a resistor of resistivity 1.59x10^-8 ohms•m. If an electric field of 19 V/m is applied across the resistor and the electron volume concentration in the conductor is 4.7x10^28 per cubic meter, determine the drift velocity, in mm/s, of the free electron constituting the current.
What is the resistivity of a wire if it is subjected to a 2.50✕102 V/m electric field, and has a current density of 4.03✕10-13 A/m2?
What is the resistivity of a wire if it is subiected to a 2.50 X 102 V/m electric field, and has a current density of 4.03X10-13 A/m2??
The resistance of a wire is given by R = Ro[1 + (T ? To)] where To= 20 C, Ro = 6 0:3 % is the resistance at 20 C, = 0:004/ C1 % is the temperature coecient of resistance, and the temperatureof the wire is T = 301 C. Determine (a) the normal resistance of thewire and (b) the uncertainty in the resistance of the wire, uR.
Given the temperature coefficient of resistivity of a certain wire to be 2 x10−3 (°C)−1.By what factor is the resistance of this wire changed when its temperature is increased from 20.0°C to 96.52 °C?
What is the resistance of a copper bus bar 9.15 meter long and 7.62 cm by 1.27 cm in cross section? Use 1.78 μΩ-cm specific resistance for copper.
What color code corresponds to a resistance of 234x10 5 10% with a temperature coefficient of resistance equal to 25x10 -6 /C o ?
A copper (resistivity = 1.72 EXP-8 Ω.m) conductor with a square cross section, 1.0 mm on a side is 100 m long and is initially 20oC. 1. If the temperature coefficient (a) of copper is 0.00393 per degree Celsius, what is the change in resistance of the copper conductor if the temperature is increased to 100 degrees Celsius? 2. What is the resistance of this conductor?