n your new job at an engineering company, your supervisor asks you to fabricate a resistor that has a resistance of R = 0.190 2 and no change in esistance with temperature. She suggests making the resistor from lengths of cylindrical carbon and Nichrome wires of equal radius, placed end-to- end. She wants the combination to fit into a machine that allows for a radius of the resistor to be r = 1.13 mm. What are the lengths of the two egments of the resistor (in m)? lichrome arbon m m

n your new job at an engineering company, your supervisor asks you to fabricate a resistor that has a resistance of R = 0.190 2 and no change in esistance with temperature. She suggests making the resistor from lengths of cylindrical carbon and Nichrome wires of equal radius, placed end-to- end. She wants the combination to fit into a machine that allows for a radius of the resistor to be r = 1.13 mm. What are the lengths of the two egments of the resistor (in m)? lichrome arbon m m

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Please state if each question is True or False; if False, please explain why
When you connect an unknown resistor across the terminals of a 1.50 VV AAA battery having negligible internal resistance, you measure a current of 17.0 mAmA flowing through it. Part A What is the resistance of this resistor? Part B If you now place the resistor across the terminals of a 12.6 VV car battery having no internal resistance, how much current will flow? Part C You now put the resistor across the terminals of an unknown battery of negligible internal resistance and measure a current of 0.483 AA flowing through it. What is the potential difference across the terminals of the battery?
Choose true or false for each statement regarding the resistance of a wire. While maintaining a constant voltage V, the current I increases when the resistivity p of a wire decreases. O While maintaining a constant voltage V, the current I increases when the cross-sectional area A of a wire expands. The resistivity p is proportional to the resistance R of a wire. Submit Answer Tries 0/2 Choose true or false for each statement regarding resistors in a circuit. O Three identical resistors in series have one third the resistance of each individual one. 8 If you connect two different resistors in parallel in a circuit, then the current that flows through each of them is different. If you connect two different resistors in parallel in a circuit, then the voltage across each of them is different.
Figure A shows two concentric metal spherical shells separated by a weakly conducting material of conductivity (o). The inner shell has a radius of (a, = a), and the outer shell has a radius of (a, = 3.5a ). Assume the inner shell carries a charge (Q), and the two shells are maintained at a potential difference (V). Find: 1- The current (I) flowing from one shell to the other? 2- The resistance between the shells (R)?
Kiting during a storm. The legend that Benjamin Franklin flew a kite as a storm approached is only a legend — he was neither stupid nor suicidal. Suppose a kite string of radius 2.10 mm extends directly upward by 0.802 km and is coated with a 0.520 mm layer of water having resistivity 155 Ω·m. If the potential difference between the two ends of the string is 176 MV, what is the current through the water layer? The danger is not this current but the chance that the string draws a lightning strike, which can have a current as large as 500 000 A (way beyond just being lethal).
The figure gives the electric potential V(x) along a copper wire carrying uniform current, from a point of higher potential V, = 8.00 µV at x = 0 to a point of zero potential at x, = 2.60 m. The wire has a radius of 2.10 mm, and copper has a resistivity of 1.69 x 10-8 0-m. What is the current in the wire? V. x (m) Number i Units (A) A
Dry air is a pretty decent insulator; it has a very high resistivity of 3x10^1302 m. Consider a capacitor that has square plates 15 cm on a side, separated by 0.8 mm of dry air. The capacitor is charged such that it has a potential of 320 V between the plates. 1. First, what is the resistance of the volume of air between the plates in GS2 (to 3 significant digits)? 2. What is the capacitance of this capacitor (in pF to 3 significant digits)?
Some human nerve cells have a long, thin cylindrical cable (the axon) from their inputs to their outputs. Consider an axon of radius -6 4.9 x 10⁰ m and length 0.55 m. The resistivity of the fluid inside the axon is 0.50 2. m. Part A Determine the resistance of the fluid in this axon. Express your answer with the appropriate units.
A straight cylindrical wire lying along the x axis has a length of L= 2.4 m and a radius of r=0.2mm. The a resistivity of the wire's material is p= 2x10-8 Qm. If the potential difference across the ends of wire is V = 8 Volts, calculate the magnitude of the current density (J=?). O A. 6.25 x 108 A/m2 • B. 1.667 x 108 A/m2 • C. 2.086 x 10S A/m? D. 3.407 x 108 A/m2
Consider a hollow spherical conductor of inner radius a and outer radius 3a. The conductivity (sigma) is a function of r, measured from the center of the sphere: sigma = c / r, where a < r < 3a and c is a constant. a) If we apply a potential difference V between it's inner and outer surfaces, with the inner surface at a higher potential, find the resulting current density j and the electric field E as a function of r. b) Find the resistance R of the spherical resistor
A conductive thin spherical shell with radius r1=1mm is placed in the center of another conductive spherical shell with radius r2=2mm. The region between the shells is filled with a material with resistivity ρ = 2x10-6 Ω.m. Assuming that the total I=2A current flows from the inner shell to the outer shell along the radius;a. the potential difference between the shells,b.Find the resistance between the shells.( π=3.14)
need help on c and e