Figure represents a section of a circular conductor of Ag nonuniform diameter carrying a current of 5.00 A. The radius of cross section Aj is 0.200 cm. What is the magnitude of the current density across A1? Taken as 7=3.14 A 99.5 kA/m? A) 196 kA/m² 234 kA/m? 398 kA/m? D) 107 kA/m²
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- A 340-km-long high-voltage transmission line 2.0 cm in diameter carries a steady current of 1,230 A. If the conductor is copper with a free charge density of 8.5 x 1028 electrons per cubic meter, how many years does it take one electron to travel the full length of the cable? (Use 3.156 × 107 for the number of seconds in a year.) yrThe magnitude Jof the current density in a certain wire with a circular cross section of radius R = 2.28 mm is given by J = (3.18 × 10®)r2, with J in amperes per square meter and radial distance r in meters. What is the current through the outer section bounded by r = 0.927R andr = R? Number UnitsA 210-km-long high-voltage transmission line 2.0 cm in diameter carries a steady current of 1,060 A. If the conductor is copper with a free charge density of 8.5 x 1028 electrons per cubic meter, how many years does it take one electron to travel the full length of the cable? (Use 3.156 x 107 for the number of seconds in a year.) yr Need Help? Read It Master It
- How many free electrons are there in a rectangular block of a conductor whose dimension is 8 mby 4 m by 3 m? The electrons of this conductor have a drift velocity of 4 m/s when a 9.6 A of currentis applied thru a cross-sectional area of 0.005 m2 . Use electronic charge of 1.6 x 10 –19 coulomb perelectron. Express your answer in scientific notation whose unit is electrons per cubic meter.A 14-gauge copper wire has a diameter of 1.88 mm. (a) What magnitude current flows when the drift velocity is 4.00 mm/s? 1.48×10² A You are correct. Your receipt no. is 162-1162 (b) How many electrons exit the wire in 9 seconds? Submit Answer Tries 0/5 Previous Tries (c) How long does it take for 0.73 C of charge to exit the wire? Submit Answer Tries 0/5There is a net passage of 3.7 x 10 18 electrons by a point in a wire conductor in 0.10 s. What is the current in the wire ?
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- A copper wire used for house hold electrical outlets has a radius of 2.5 mm (1Imm = 10-*m). Each Copper atom donates one electron for conduction. If the electric current in this wire is 22.00 A, copper density is 8900 kg/m and its atomic mass is 64 u. (lu = 1.66 x 10-27 kg), the electrons drift velocity v in this wire is a) 1.90 x 10- m/s. b) 8.36 x 10 m/s, c) 1.60 x 10+ m/s. d) 1.42 x 104 m/s, e) None of the above.If a metal wire carries a current of 29.0 mA,how long does it take for 7.60×1020 electronsto pass a given cross-sectional area anywherealong the wire? The fundamental charge is1.602 × 10−19 C.Answer in units of s.A copper wire of cross-sectional area 3.20 × 10-6 m² and length 3.40 m has a current of 3.00 A uniformly distributed across that area. (a) What is the magnitude of the electric field along the wire? (b) How much electrical energy is transferred to thermal energy in 30.0 min?