3. Calculate the cross-sectional area, in mm^2, of a piece of copper wire, 40 m length and having a resistance of 0.25 Q. Take the resistivity of copper as 0.02x10¬6 Nm.
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- Question 10 Find the resistance in micro-ohms at 20 °C of an annealed copper bus bar 4.8 m in length and 0.4 cm by 3.6 cm in rectangular cross section. The resistivity of annealed copper is 1.72 x 10-8 Q-m at 20 °C. Your Answer:The length and diemeter of a copper wire are found to be 100 and 0.002 m, respectively. Consider that the resiativity of the copper wire is 1.72 x 10 -m. Calculate the valne of the resistance.A two wires, one of Copper and the other of Nickel, if the resistance of the first is (12.7 Q), and the second is (11.6 0) at room temperature, at what temperature are their resistances equal? Note that the temperature coefficient of resistivity of Copper is (0.0039 C-1), and for Nickel it is equal to (0.006 C1).
- 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 you2. 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.Find the hall coefficient of a silicon material used in a Hall generator with a gap distance is 2.0 cm. When a current of 300 A flows, the hall voltage is recorded as 10 V and a magnetic flux density of 0.2 T is produced. Lütfen birini seçin: a. 0.0461 b. 0.0074 c. 0.0695 d. 3.3333 e. 0.0033
- A resistor in the shape of a spherical shell is made up of a material with resistivity of 1.93 x 10-80-m has inner and outer radii of 1.5 mm and 3.7 mm, respectively. Determine the resistance of the said resistor. O 12.1038 microohms O The answer cannot be found on the other choices. O 608.8035 nanoohms O 902.9482 nanoohmsA 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. 797497.60Wire size and voltage drop The cross-sectional area of wire is measured in circular mils (CM). 1 mil = 1/1000 inch CM = squaring of mil Example 1: Find CM for a piece of wire has a diameter of .008 of an inch. .008 = 8/1000 = 8 mils CM = 8² = 64 Find CM for a piece of wire has a diameter of .008 of an inch. 5. Find Cm for a piece of wire has a diameter of .064 of an inch. 6. Find CM for a Wire has 24 strands of wire and each strand is .012 inches in diameter.
- 15. Which of the following is TRUE? a. A conductor has a large amount of energy gap between conduction band and valance band b. A semi-conductor material does not allow the flow of electrons at all time. c. A good insulator material has 8 valance electrons d. A good conductor material has 3 valance electrons.Identify the statement from the following when the inductance can have high value. a. All the given options O b. If the number of turns of the wire is more O c. If the length of the wire is longer O d. If the cross-sectional area is lessCalculate the cross-sectional area, in sq. mm, of a piece of aluminum wire 100 m long and having a resistance of 2 Q. Take the resistivity of aluminum as 0.03x10^-6 Q-m.