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 23.5 °C. The wire is placed in a new environment of unknown temperature where the measured current is 0.3758 A. The temperature coefficient of resistivity of aluminum is 0.00429 (°C) -¹ -1 Part A What is the unknown temperature? Express your answer using three significant figures. T= Submit 5 ΑΣΦ 1 d Request Answer ? °C Review | Constants

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A certain laboratory experiment requires an aluminum wire of length of 23.0 m and a resistance of 2.20 at 20.0°C. What diameter wire must be used? (The resistivity of aluminum at 20.0°C is 2.82 x 10-8. m.) Enter a number. differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. mm

Part A A length of aluminum wire is connected to a precision 10.00-V power supply, and a current of 0.4232 A is precisely measured at 23.5 °C. The wire is placed in a new environment of unknown temperature where the measured current is 0.3758 A. The temperature What is the unknown temperature? Express your answer using three significant figures. coefficient of resistivity of aluminum is 0.00429 (°C)-1 1 ΑΣφ ? T = °C Submit Request Answer

Q6/ A length of copper wire with a cross sectional area of 1 mm2 carries a current of 0.4 A. The conductivity of copper at 20 C° is 5.78 x 107 (N. m)-1, and the free electron concentration is 8.43 x 1028 m-3. Find the following parameters: a- Drift velocity. b- The mobility of the electron. c- Electric field strength. d- Resistance of the copper wire at 2 Volt.

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 5 ΑΣΦ V Request Answer ? °C

Current and Resistance  Problem 14:  Resistivity in metals increases with temperature according to the equation ρ(T)=ρ0[1+α(T−T0)] where α is the temperature coefficient of resistivity, and ρ0 is the resistivity at reference temperature T0. For a particular wire, the temperature coefficient of resistivity is α=6.88×10−3∘C−1, and the resistivity is ρ0 = 5.41×10−7Ω⋅m at the reference temperature T0=232∘C.   Part (b)  What is this temperature T2, in degrees Celsius, for the wire described in the problem statement?

A 46.0-g sample of a conducting material is all that is available. The resistivity of the material is measured to be 13 x 10-8 - m, and the density is 7.51 g/cm³. The material is to be shaped into a solid cylindrical wire that has a total resistance of 1.5 2. (a) What length of wire is required? m (b) What must be the diameter of the wire? mm Submit Answer

A rod of length 2.3 m, with a rectangular cross section (1.5mm x 3.0 mm) is made ofa material with a resistivity of 6.1 × 10^-8 Ohm.  A potential difference of 5.0 V isplaces across the ends of the rod.a.  Draw a clear physics diagram of the problem.b.  At what initial rate is heat generated in the rod?c.  Will the rate from part (b) increase, decrease, or remain constantover time, as the rod remains connected to the 2.5 V potential difference?Explain briefly

PROBLEM 08 A 1-inch diameter wire of 10-ft length (which has an internal resistance of 3 kQ, and thermal conductivity of 300 W/m-C) experiences a current of 10 amperes. Because of this, the heat generated from the caused the melting of the wire starting from the center (the melting temperature of the wire is 2300°C). It was found that the melted part of the wire has a radius of 0.1 in from which conduction of electricity no longer generates heat. Other given: Q = 2.02 x 108 W/m3 a. What would be the temperature profile of the wire (T = f(r)) if the constants from integration where found to be C1 = 271,088.04 W/m, and C2 = 929,466.79 W/m? b. What would be the temperature of the wire at r = 0.5 in? c. What would be the heat flowrate at r= 0.1 in?