A 1,000 ft. of aluminum wire, whose diameter is 0.365 in., has a resistance of 0.13 Q at 20°C. What is its percent conductivity?
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- A wire has a circular cross-section of radius r= 3.53 mm. The conductivity of the wire is 1x10^5 (Ohm, meter) and its lengthis 2m. The total resistance of the wire in Ohms is:O a. 0.51O b. 0.72ç. 0.26O d. 5136.07O e. 797497.60Besides lower electrical conductivity, suggest a reason why ruthenium is not used inelectrical transmission wires. Give a detailed responseFigure 1 shows a ferromagnetic core with a relative permeability of 1850, the depth of the core is 10 cm. The air gap on the core is 0.2 cm with effective area 5 % larger than their physical size due to fringing effects. Given the number of turns N = 500 and current i = 2 x, where x is the last digit of your student ID (example: EEE1705590, then i = 20 A): (a) Find the total reluctance of the core and air gap. [CLO1-PL01:C2] (b) Find the flux density of the air gap. [CLO1-PLO1:C2] 13 cm 23 cm 9 cm 5.6 сm Air gap 31 cm N turns 7 cm Figure 1
- 2. When a current of 1A flows through a wire, the drift velocity of the electrons is 0.9 mm/s. What will be the drift velocity of the electrons when a 2A current flows through another wire of the same material having double the length and double the area of cross section and same temperature.A nickel chromium alloy conductor of resitance 24 ohms is 110 inches long and has a resistivity of 640 ohms-CM/ft. Determine its diameter.2. Anelectric current in a conductor varies with time according to the expression t0- sin t where lis in amperes and tis in seconds, What is the charge-time graph related to this curren?
- As the voltage across conductors is increased, the gradient around the surface of conductor ... .. O becomes zero O remains same O decreases O increasesNb3Sn and GaV are candidates for a superconducting application, when the magnetic field is 150,000 Oe. Which of them would require the lowest temperature in order to be a superconductor?: Explain briefly various theories of breakdown in liquid dielectrics
- What do you understand by 'instrinsic strength' of a solid dielectric? How does breakdown occur due to electrons in a solid dielectric?What effect does temperature have on the electrical conductivity of a semiconducting material? How does this compare with the effect of temperature on the electrical conductivity of a typical metal?Determine the mutual inductance between a very long straightwire and a conducting circular loop of radius “b” m set up “d” mapart on the same plane as shown figure.Problem: