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 .
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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 together so the total resistance is the sum of their separate resistances.
Part A
What value should each of these resistors have (at 0 ∘C∘C) so that the combination is temperature independent?
R0C=
Part B
RON
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A power station delivers 950 kWkW of power at 12,000 VV to a factory through wires with total resistance 5.0 ΩΩ .
How much less power is wasted if the electricity is delivered at 50,000 VV rather than 12,000 VV?
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The Tevatron accelerator at Fermilab (Illinois) is designed to carry an 18 mAmA beam of protons traveling at very nearly the speed of light (3.0×108 m/s)(3.0×108 m/s) around a ring 6300 mm in circumference.
How many protons are in the beam?
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A copper pipe has an inside diameter of 3.00 cmcm and an outside diameter of 5.00 cmcm (the figure (Figure 1)).
What is the resistance of a 14.5 mm length of this pipe?
A length of aluminum wire is connected to a precision 10.00-V power supply, and a current...
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?.
Example # 22.1: A 6.0 volt battery is connected to a 3.0 ohm resistor for 1 hour. A) Find the current through the resistor. B) Find the total charge that passes through the resistor. Example # 22.2: Find the resistance of a nichrome wire that is 2.5 m long and has a diameter of 2.0 mm. The resistivity of nichrome is 1.5 x 10 . Example # 22.3: A) Find the power output of the battery in 22.1. B) Find...
SALEM STATE Department of Chemistry ) An ordinary fashlight uses tuo identical AA-batteries connected in series. If each battery has a voltage of err tneglecting nternal resistance), and the bulb draws 0.504 when turned on, the resistance of the balb is: A) zero 13) 1.0 ? c) 2.0 ? D) 3.0 2 E) 4.02 (2) In problems 1, the power dissipated when the bulb turned on is: A) zero B) 10 W C)20 w D)3.0 W E) 40 W (3)...