A rectangular aluminum bus bar is 0.9m long, 0.15 m wide, 0.013m (1.3cm) thick. If the current in the bus bar flows along its length, and the conductivity (6) of aluminum is 3.57x10^8 S/m. Calculate the bus bar resistance in μ .
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- A copper conductor is connected in parallel with twice its length of aluminum conductor. The resistivity of copper is (0.0159 µ0. m) and that of aluminum is (0.0254 µ0. m). If the diameter of the aluminum is (10 mm). Determine the necessary diameter of the copper conductor in order that each conductor will carry the same current.> Figure 1 shows a ferromagnetic core whose mean path length is 40 cm. There is a small gap of 0.05 cm in the structure of the otherwise whole core. The cross-sectional area of the core is 12cm2, the relative permeability of the core is 4000 and the coil of wire on the core has 400 turns. Assume that fringing in the air gap increases the effective cross-sectional area of the air gap by 5 percent. Given this information. Find the total reluctance of the flux path (iron plus air gap) and the current required to produce a flux density of 0.5 T in the air gap. N=400 tums 0.05 cm A=12 cm? le-40 cm Figure 1> Figure 1 shows a ferromagnetic core whose mean path length is 40 cm. There is a small gap of 0.05 cm in the structure of the otherwise whole core. The cross-sectional area of the core is 12cm?, the relative permeability of the core is 4000 and the coil of wire on the core has 400 turns. Assume that fringing in the air gap increases the effective cross-sectional area of the air gap by 5 percent. Given this information. Find the total reluctance of the flux path (iron plus air gap) and the current required to produce a flux density of 0.5 T in the air gap. N=400 0.05 cm A-12 cm - 40 cm Figure 1
- A copper conductor is connected in parallel with twice its length of aluminum conductor. The resistivity of copper is (0.0159 µN. m) and that of aluminum is (0.0254 µn. m). If the diameter of the aluminum is (10 mm). Determine the necessary diameter of the copper conductor in order that each conductor will carry the same current.Which of the following is not true for ferromagnetic materials? Please choose one: a. High?mthey have value. b.Above the Curie temperature, they lose their non-linear properties. C. a fixedµrthey have value. D.The energy loss is proportional to the area of the hysteresis loop.the depth of the solid core is 5 cm. Assume that the relative permeability of the core is 1000 and remains constant and that the current in the coll is 4 A. ignore the fringing effects at the air gap and find the following
- A copper conductor is connected in parallel with twice its length of aluminum conductor. The resistivity of copper is (0.0159 µN. m) and that of aluminum is (0.0254 uN. m). If the diameter of the aluminum is (10 mm). Determine the necessary diameter of the copper conductor in order that each conductor will carry the same current.An aluminum wire and a copper wire have the same resistance and the same length. Find the ratio of their diameters.A piece of silver wire has a resistance of 1 ohm. Determine the resistance of alead wire one-third the length and one-third the diameter if the resistivity of lead wire is 30 times that of silver. NOTE: Please explain where did you get the variables so I can understand them. Thank you
- Reluctance of core material (R) Cross-sectional area (A) 1520 Number of turns FUCCE Fig. 6 Magnetic coil Flux (6) Length around core (1)4- The iron is of infinite permeability (u>00). For: Ri = 5.8 cm, Ro = 7.0 cm, depth3D4 cm, g 0.35 cm Calculate: a. the mean core length l and the core cross-sectional area Aç. b. the reluctance of the core Rc and that of the gap Rg. Ro R N turns4) We usually think of wires as perfect (R=0) conductors, which is not quite accurate. Real wires have resistance albeit small - usually less than an ohm. With this in mind: a. Consider a uniform cylindrical copper wire that has diameter of 1 mm and is 10 m long. What is the resistance of this wire? The resistivity of copper is 1.72 x 10-8 9-m. b. This wire is cut in half, and the two strands are used to connect an electric heater to an outlet supplying 1500 W at 120 V. Draw a simple circuit diagram, including the voltage source, resistances of the connector wires, and the calculated resistance for the heater. C. How much of the total 1500 W is absorbed by the connector wires, not by the electric heater? d. If the specific heat and density of copper are 385 J/kg°C and 8940 kg/m³ respectively, how much will the connector wires heat up after 1 minute of use? (Assume all energy absorbed by the connector wires is converted to heat and remains in the copper wire.) Remember that E cmAT,…