An aluminum rod has a resistance of 3.12 Ohm at 20.0 degree C. Calculate the resistance...
A square shaped ( 4.7 mm by 4.7 mm) metal rod has resistance of 1.41 ohm. The resistivity of material is 0.5* 1.41 *10^-6 ohm-m. What is the length of the rod in meter?
An aluminum wire has a resistance of 3.00 2 at 31.0°C. Determine its resistance (in 2) at 431°C. The temperature coefficient of resistivity for aluminum wire is 3.90 x 10-3 (°C)-1. (Assume that the temperature coefficient of resistivity was measured using the reference temperature 20°C.)
When a metal rod is heated, not only its resistance but also its length and cross‐sectional area change. The relation R = ρL / A suggests that all three factors should be taken into account in measuring ρ at various temperatures. If the temperature changes by 1.10oC, what percentage changes in (a) L, (b) A, and (c) R occur for a copper conductor? The coefficient of linear expansion is 1.70 × 10-5 K-1. Coefficient of resistivity for copper is 4.30...
You want to insert an aluminum rod, which at 20°C has a radius of 1.00020 cm into a copper tube which has a radius of 1.00010 cm at the same temperature. You decide to put both of them in the refrigerator. At what temperature will the rod just fit if both are cooled to the same temperature? The coefficient of thermal expansion for aluminum is 2.4 × 10-5 K-1, and that of copper is 1.7 × 10-5 K-1.
A length of aluminum wire has a resistance of 20.0 Ω at 30.0°C. When the wire is warmed in an oven and reaches thermal equilibrium, the resistance of the wire increases to 36.2 Ω. (a) Neglecting thermal expansion, find the temperature of the oven.
A straight rod consists of of 0.82 cm long piece of aluminum attached to a 2.84 cm long piece of steel. By how much will the length of this rod change if its temperature is increased from 11 degree celsiu to 28 degree celsius. The average coefficient of linear expansion of aluminum and steel is 2.5x10^-5 (celsius)^-1 and 1.2 x10^-5 (celsius)^-1 respectively.
A copper wire has a resistance of 0.500 Ω at 20.0°C, and an iron wire has a resistance of 0.520 Ω at the same temperature. At what temperature are their resistances equal? The temperature coefficient of resistivity for copper is 3.90 *10^-3(°C)−1 and for iron it is 5.00 *10^-3(°C)−1.
A copper wire has a resistance of 0.540 Ω at 20.0°C, and an iron wire has a resistance of 0.579 Ω at the same temperature. At what temperature are their resistances equal? The temperature coefficient of resistivity for copper is 3.90 10-3(°C)−1 and for iron it is 5.00 10-3(°C)−1.
(4 points) A steel meter stick has a calibrated (accurate) length at 20.0°C. It is used to measure the length of a thin zinc rod at 20.0°C which gives a measured length of 0.9580 m. The zinc rod is measured again, but now with both the steel meter stick and zinc rod at 85.0°C. Find the absolute error in the length of the zinc rod as measured by the steel meter stick at 85.0°C. The coefficient of linear expansion of...
An aluminum measuring rod, which is correct at 5.0 C measures a certain distance as 88.42 cm at 35.0 C.Determine the error in measuring the distance due to the expansion of the rod. If this aluminum rod measures a length of steel as 88.42cm at 35.0 C, what is the correct length of the steel at 35 degrees C? The coefficient of linear expansion of aluminum is 22 x10^-6 C^-1.