Exercise 25.11 A 1.40 m cylindrical rod of diameter 0.450 cm is connected to a power...
Exercise 25.11
A 1.40 m cylindrical rod of diameter 0.450 cm is connected to a power supply that maintains a constant potential difference of 17.0 V across its ends, while an ammeter measures the current through it. You observe that at room temperature (20.0 ∘C) the ammeter reads 18.2 A, while at 92.0 ∘C it reads 17.1 A. You can ignore any thermal expansion of the rod.
Part A
Find the resistivity for the material of the rod at 20 ∘C.
Part B
Find the temperature coefficient of resistivity at 20 ∘C for the material of the rod.
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Exercise 25.11
A 1.40 m cylindrical rod of diameter 0.450 cm is connected to a
power...
A 1.60 m cylindrical rod of diameter 0.550 cm is connected to a power supply that...
A 1.60 m cylindrical rod of
diameter 0.550 cm is connected to a power supply that maintains a
constant potential difference of 14.0 V across its ends, while an
ammeter measures the current through it. You observe that at room
temperature (20.0 ∘C) the ammeter reads 18.3 A , while at 92.0 ∘C
it reads 17.3 A . You can ignore any thermal expansion of the
rod.
232 Electric Current Exercise 25.11 Constants PartA A 1.60 m cylindrical rod of...
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2. A cylindrical rod of silicon (2 cm in diameter and 20 cm long) has a...
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A 1.60 m cylindrical rod of
diameter 0.550 cm is connected to a power supply that maintains a
constant potential difference of 14.0 V across its ends, while an
ammeter measures the current through it. You observe that at room
temperature (20.0 ∘C) the ammeter reads 18.3 A , while at 92.0 ∘C
it reads 17.3 A . You can ignore any thermal expansion of the
rod.
232 Electric Current Exercise 25.11 Constants PartA A 1.60 m cylindrical rod of...
2. A cylindrical rod of silicon (2 cm in diameter and 20 cm long) has a 20 mA hole current flowing when 10 volts is impressed lengthwise upon the sample. Find the following: a. The resistivity of the rod. b. The drift velocity of the holes. c. The density of free holes and the total number of holes in the rod. d. Repeat Parts a, b, and c if the current flowing was an electron current. How and why do...
A long cylindrical rod of diameter 220 mm with thermal conductivity 0.5 W/m-K expe riences uniform volumetric heat generation of 25,000 W/m3. The rod is encapsulated by a circular sleeve having 7 W/m K. The outer surface of the sleeve is exposed to cross flow of air at 25°C with a convection coefficient of 25 W/m2-K. Find the temperature at the interface between the rod and sleeve, and on the outer surface. an outer diameter of 410 mm and thermal...
A 3 m rigid bar AB is supported with a vertical translational spring at A and a pin at B The bar is subjected to a linearly varying distributed load with maximum intensity g Calculate the vertical deformation of the spring if the spring constant is 700 kN/m. (ans: 21.43 mm) 2. A steel cable with a nominal diameter of 25 mm is used in a construction yard to lift a bridge section weighing 38 kN. The cable has an...
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