Answer the question in the photo thank u 6. Based on this chart, what materialwas used to manufacture a wire if itsresistance is 4.46 milliohm when thelength of the wire is 50m and has aradius of 10mm? *TABLE 30.2 Resistivity and conductivity of conductingmaterialsResistivity(Ωm)Conductivity(N-'m-1)MaterialAluminum2.8 × 10-83.5 x 107Сopper1.7 × 10-86.0 × 107Gold2.4 X 10-84.1 × 107Iron9.7 × 10-81.0 × 107Silver1.6 X 10-86.2 × 107Tungsten5.6 × 10-81.8 × 107Nichrome*1.5 × 10-66.7 × 105Carbon3.5 X 10-52.9 × 10ª*Nickel-chromium alloy used for heating wires.O SilverAluminumO • GoldO • Copper

This question belongs to circuit theory . It is based on the concept of relation between resistance…

6. Based on this chart, what material was used to manufacture a wire if its resistance is 4.46 milliohm when the length of the wire is 50m and has a radius of 10mm? * TABLE 30.2 Resistivity and conductivity of conducting materials Resistivity (Ωm) Conductivity (N-'m-") Material Aluminum 2.8 X 10-8 3.5 x 107 Сopper 1.7 X 10-8 6.0 × 107 Gold 2.4 X 10-8 4.1 X 107 Iron 9.7 × 10-8 1.0 x 107 Silver 1.6 X 10-8 6.2 X 107 Tungsten 5.6 X 10 8 1.8 X 107 Nichrome* 1.5 × 10-6 6.7 × 105 Carbon 3.5 X 10-5 2.9 X 104 *Nickel-chromium alloy used for heating wires. O Silver Aluminum O • Gold O • Copper

6. Based on this chart, what material was used to manufacture a wire if its resistance is 4.46 milliohm when the length of the wire is 50m and has a radius of 10mm? * TABLE 30.2 Resistivity and conductivity of conducting materials Resistivity (Ωm) Conductivity (N-'m-") Material Aluminum 2.8 X 10-8 3.5 x 107 Сopper 1.7 X 10-8 6.0 × 107 Gold 2.4 X 10-8 4.1 X 107 Iron 9.7 × 10-8 1.0 x 107 Silver 1.6 X 10-8 6.2 X 107 Tungsten 5.6 X 10 8 1.8 X 107 Nichrome* 1.5 × 10-6 6.7 × 105 Carbon 3.5 X 10-5 2.9 X 104 *Nickel-chromium alloy used for heating wires. O Silver Aluminum O • Gold O • Copper

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

Section: Chapter Questions

Problem 14RQ

See similar textbooks

Similar questions

10) A certain batch of copper wire was found to have a conductivity of 98% at 20°C. What is its resistivity in un-cm? www
A certain batch of copper wire was found to have a conductivity of 98% at 20°C. What is its resistivity in u0-cm?
10) A certain batch of copper wire was found to have a conductivity of 98% at 20°C. What is its resistivity in un-cm?
ire D are made from the same material of resistivity p-2.0 - mm, and those of wire D are Lo-0.50.m and ro-0.75 mm. The wires are and 2? C
Question A suspension type insulator has three units with self-capacitance C and ground capacitance 0.1C. What will be the string efficiency?
If the cross sectional area of a conductor is doubled, then the resistance of the conductor remains the same. becomes half of the initial value. becomes double the initial value. becomes four times the initial value.
Two conductors, one of copper and the other of iron, are connected in parallel and carry equalcurrents at 25°C. How many percent of the total current will the copper conductor carry if thetemperature is raised to 100°C? The temperature coefficients of resistance at 0 °C are 0.0043 /°Cand 0.0063 /°C for copper and iron, respectively.
Materials whose conductivity falls between those of conductors and insulators are called
Calculate the electrical conductivity of pure platinum at -200oC. data: resistivity of Pt a Tamb = 9.85x10-6ohm.cm; resistivity coefficient per T of Pt (a = 0.0039 ohm / ohmoC)
We want to investigate how the field strength will be with air as dielectric and with steatite. A plate capacitor is placed in a 24 kV network between phase and ground. The relative permittivity of air is &=1 and for steatite &-6. The plate capacitor has area = 1m². The distance between the electrodes is 2 mm. Ep = 8.854-10-12 F/m A=1m² d=2mm a) Calculate the maximum field strength in the plate capacitor. (Answer: 9.8kV/mm) b) What is the capacitance of the capacitor if we use steatite? (Answer: C = 26.6nF)
8. Liquids with solid impurities a) Have higher dielectrie strength b) Of large size have higher dielectric strength c) Have lower dielectric strength as compared to pure liquids d) None of the above 9. Peak to peak ripple is defined as a) the difference between average de voltage and peak value b) the difference between maximum and minimum de voltage c) the difference between maximum ac and average dc voltages d) the difference between ac (rms) and average de voltages 10. In a Cockroft-Walton circuit, input voltage 100 kV load current 25 mA, supply frequency 100 Hz, each capacitor 10 nF. The optimum no. of stages for maximum output voltage is a) 1 b) 2 c) 10 d) 35
Question 1 A ferromagnetic core with a relative permeability of 1500 is shown in Figure 2. The dimensions are as shown in the diagram, and the depth of the core is 7 cm. The air gaps on the left and right sides of the core are 0.070 and 0.020 cm, respectively. Because of fringing effects, the effective area of the air gaps is 5 percent larger than their physical size. If there are 400 turns in the coil wrapped around the center leg of the core and if the current in the coil is 1.0 A, what is a) the flux in each of the left, center, and right legs of the core? b) the flux density in each air gap? 7 cm ст ст 30 cm 30 cm 7 cm 400 turns 0.05 cm 30 cm 0.07 cm 7 cm Core depth = 7 cm Figure 2