The temperature coefficient of resistivity a is based on a reference temperature T, of 20.0°C and satisfies the equation p = Po[1 + a(T – To)], where Po is the resistivity of the material at To = 20.0°C. Suppose the coefficients were given the symbol B and were based on a To of 0°C, so that they satisfied the equation p = Po*[1 + B(T – 0°C)], where Po* is the resistivity of the material at 0°C. Obtain the value for the coefficient a from this table and then determine the value of the coefficient B for silver. (°C)-1 Need Help? Read It

The temperature coefficient of resistivity a is based on a reference temperature T, of 20.0°C and satisfies the equation p = Po[1 + a(T – To)], where Po is the resistivity of the material at To = 20.0°C. Suppose the coefficients were given the symbol B and were based on a To of 0°C, so that they satisfied the equation p = Po[1 + B(T – 0°C)], where Po is the resistivity of the material at 0°C. Obtain the value for the coefficient a from this table and then determine the value of the coefficient B for silver. (°C)-1 Need Help? Read It

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

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.
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.
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.
Consider a resistor of resistivity 3.96 × 10-8 Ω • m. If an electric field of 12 V/m is applied across the resistor and the electron volume concetration in the conductor is 5.16 × 1028 per m3, determine the drift velocity, in mm/s, of the free electron constituting the current.
A more general definition of the temperature coefficient of resistivity is α =1ρ|dρdT|where ρ is the resistivity at temperature T. (a) Assuming α is constant, show that ρ = ρ0eα(T−T0) where ρ0 is the resistivity at temperature T0. (b) Using the series expansion ex ≈ 1 + x for x << 1, show that the resistivity is given approximately by the expression ρ = ρ0[1 + α(T − T0)] for α(T − T0) ≪ 1
Resistivity in metals increases with temperature according to the equation: ρ(T) = ρ0[1 + α(T - T0)] where α is the temperature coeficcient of restivity, and ρ0 is the restivity at the reference temperature T0. For a particular wire, the temperature coeficcient of restivity is α = 3.83 X 10-3 °C-1, and the restivity is ρ0 = 7.71 X 10-7 Ωm at the reference temperature T0 = 297°C. Find an expression for the temperature T2, at which the resistance of a particular wire will be twice as high as it is at the reference temperature T0. (Both temperatures are in degrees Celsius) Use this expression to find the temperature in degrees Celsius for T2. If the wire has a length of 1.00m and it has a circular cross section with a radius of 1.00cm, what is the resistance in ohms, at a temperature which is twice the reference temperature, T = 2T0 ?
What color code corresponds to a resistance of 234x10 5 10% with a temperature coefficient of resistance equal to 25x10 -6 /C o ?
A length of aluminum wire of wide L is connected to a power source of 10 V, measured with precision a current of 0.3445 A at 20°C. It is placed on the wire in another environment where the temperature is unknown and a current of 0.2760 A is measured. What is the unknown temperature? Aluminum resistivity 2.65x10-8 Temperature coefficient 0.00429 Please USE SI system
IF a alloy containing a resistivity of 1.1 × 10−6 Ωm. From a roll of wire of 2 mmdiameter, a length 1.5 m long is taken. if a secon piece containing the same length being 1.5 m is connected parallel to the first. A what would its resistance be but also the conductance of the pair.
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?).
In a normal conductor heat is generated at a rate I 2R. Therefore a current-carrying conductor must dissipate heat effectively or it can melt or overheat the device in which it is used. Consider a long cylindrical copper wire (resistivity 1.72x 10-8 Ω*m) of diameter 0.75 mm. If the wire can dissipate 80 W/m2 along its surface, what is the maximum current this wire can carry?
Nichrome alloy has a resistivity of 110 × 10−6 Ωcm. From a roll of nichrome wire of 2.5 mmdiameter, a length 1 m long is taken.a) Calculate the resistance R and the conductance G of the piece of wire.b) A second piece also 1 m long is connected in parallel to the first. Calculate the resistanceand conductance of the pair.