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 190-km-long high-voltage transmission line 2.00 cm in diameter carries a steady current of 1,230 A. If the conductor is copper with a free charge density of 8.50 × 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.) yrA 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 ItThe 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 Units
- 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 ?
- A metal wire of cross-sectional area 2.00x10-6 m² and length 4.0 m has a current of 25.0 A uniformly distributed across that area. If the conductivity of the metal is, 5.9x107 (.m)-!, calculate the magnitude of the electric field, in V/m, along the wire?A hollow metal cylinder has inner radius a, outer radius b, length L, and conductivity O. The current 1 is radially outward from the inner surface to the outer surface. a) Find an expression for the electric field strength inside the metal as a function of the radius r from the cylinder's axis. 0) Evaluate the electric field strength at the inner and outer surfaces of an iron cylinder given the following: a =1.0cm b= 2.5cm L=10.0cm I = 25 AA current, i(t) = 50 cos(100t) enters the input terminal of an electric device. What is the charge q at t = 5 ms (given that at t =0, q =0) ? %3D 0.5/T coul 5 coul 5/T coul O 0.5 coul
- 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 320-km-long high-voltage transmission line 2.0 cm in diameter carries a steady current of 1,040 A. If the conductor is copper with a free charge density of 8.5 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.) yr