A length of aluminum wire has a resistance of 28.0 Ω at 32.0°C. When the wire is warmed in an oven and reaches thermal equilibrium, the resistance of the wire increases to 43.1 Ω. (a) Neglecting thermal expansion, find the temperature of the oven. °C (b) Qualitatively, how would thermal expansion be expected to affect the answe

The resistance of a wire at 0° Celsius is measured to be 15Ω. If the temperature increased to 25° Celsius, determine the change of resistance for the wire. Assuming the use of copper wire (α0 = 0.004041).     Change of resistance for the wire=

The resistance of a certain power line is 1500 at 20°C. Find the line resistance when the sun heats up the line to 42°C (T-236°C and x=0.00391)

A tungsten wire in a vacuum has length 26.0 cm and radius 6.00 mm. A potential difference is applied across it. (a) What is the resistance of the wire at 293 K? Ω (b) Suppose the wire reaches an equilibrium temperature such that it emits 70.0 W in the form of radiation. Neglecting absorption of any radiation from its environment, what is the temperature of the wire? (Note: e = 0.320 for tungsten.) K (c) What is the resistance of the wire at the temperature found in part (b)? Assume the temperature changes linearly over this temperature range. Ω. (d) What voltage drop is required across the wire? (e) Why are tungsten lightbulbs energetically inefficient as light sources?

A wire 3.00 m long and 0.450 mm2 in cross-sectional area has a resistance of 39.5 Q at 20.0°C. If its resistance increases to 40.2 Q at 28.5°C, what is the temperature coefficient of resistivity? (°C)-1

The resistance of a wire increases by 22 percent when the temperature of the wire is increased from 10 degrees C to 105 degrees C. What is the temperature coefficent (a) of the wire's material?

A metal resistance thermometer has a resistance = 75.0 2 at = 20 °C. The temperature coefficient of resistance of is 5.2x10^-3/0C. The thermometer is immersed in a container with a melting substance, at which point increases to 120.0 S. What is the melting point of the metal? O a 106.05 °C 149.49 °C 135.38 °C 118,61 °C O e 141.07 °C Of 132,99 °C g 99.49 °C 146.05 °C 139.49 °C 177.97 °C k 154.92 °C 142.50 °C 189.49 °C 92.99 °C 114.92 °C 78.61 °C 102.50 °C Or 137.97 °C 101.17 °C 95.38 °C O O O O 00

An engineering intern is studying the effect of temperature on the resistance of a current carrying wire. She applies a voltage to a aluminum wire at a temperature of 53.0°C and notes that it produces a current of 1.10 A. If she then applies the same voltage to the same wire at -88.0°C, what current should she expect (in A)? The temperature coefficient of resistivity for aluminum is 3.90 x 10-³ (°C)-¹. (Assume that the reference temperature is 20°C.) A

When initially at 20°C, the power being supplied to a 691 Ohm resistor in a circuit is 8.29 W. Over time, the temperature of the resistor increase to 168°C. If the temperature coefficient of resistivity of the material composing the resistor is 5.75 x 10-3 °C-1, what power is supplied to the resistor at its operating temperature?