Ch.18 #6
A length of aluminum wire is connected to a precision 10.00-V power supply, and a current of 0.4252 A is precisely measured at 23.5 ∘C. The wire is placed in a new environment of unknown temperature where the measured current is 0.3698 A . The temperature coefficient of resistivity of aluminum is 0.00429 (∘C)−1
Part A
What is the unknown temperature?
Ch.18 #6 A length of aluminum wire is connected to a precision 10.00-V power supply, and...
A length of aluminum wire is connected to a precision 10.00-V power supply, and a current of 0.4583A is precisely measured at 25.0?C. The wire is placed in a new environment of unknown temperature where the measured current is 0.3673A. What is the unknown temperature?.
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 27.0 ∘C. The wire is placed in a new environment of unknown temperature where the measured current is 0.3804 A . --------------------------------------------------------------------------------------------------------------------------------------------------- For some applications, it is important that the value of a resistance not change with temperature. For example, suppose you made a 4.00 −kΩ−kΩ resistor from a carbon resistor and a Nichrome wire-wound resistor connected...
Calculate the ratio of the resistance of 11.0 m of aluminum wire 2.5 mm in diameter, to 23.0 m of copper wire 1.9 mm in diameter. The resistivity of copper is 1.68×10−8Ω⋅m and the resistivity of aluminum is 2.65×10−8Ω⋅m. --------------------- A length of aluminum wire is connected to a precision 10.00-Vpower supply, and a current of 0.4132 A is precisely measured at 23.5 ∘C. The wire is placed in a new environment of unknown temperature where the measured current is...
A wire 2.60 m long with a cross-sectional area of 7.07x10-6 m2 is connected to a 30.0 V power supply. If a current of 12.0 A is measured in the wire, a) what is the resistivity of the wire in ohm-meters? Answer in scientific notation. b) If this resistivity had been measured at 20.0 °C, what temperature, in Celsius, would we need to heat/cool the wire to for the resistance to be 4.25 Ω if the temperature coefficient of resistivity...
15. A spool of aluminum wire 290 m long and with a diameter of 0.440 mm is at 20.0°C. For aluminum, the resistivity is 2.82 ✕ 10−8 Ω · m and the temperature coefficient of resistivity is 3.90 ✕ 10−3 (°C)−1. (a) What is the magnitude of the electric field (in V/m) in the wire if it carries a current of 0.600 A? V/m (b) What is the electric power (in W) delivered to the spool while it carries a...
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...
A 1.70 m cylindrical rod of diameter 0.500 cm is connected to a power supply that maintains a constant potential difference of 13.0 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 17.3 A . You can ignore any thermal expansion of the rod. 1) Find the resistivity and for the material of the rod at 20...
7) A 4.0 m length of gold wire is connected to a 1.5 V battery, and a current of 4.0 mA flows through it. What is the diameter of the wire? (The resistivity of gold is 2.44 × 10-8 Ω·m.) A) 17 µm B) 8.5 µm C) 48 µm D) 9.0 µm
A wire with a length 68 cm and a diameter of 9.0 cm is made of an unknown material that has a temperature coefficient α of 4.6 x 10^(-3) C^(-1)°. At 20 C°, a voltage difference of ΔV is applied to the ends of the wire, and a power output of 18.7 watts is measured. If the diameter of the wire triples, the length halves, and the temperature increases to 50 C°, what will be the new power output across...
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...