
27. A wire with a length of 150 m and a radius of 0.30 mm carries...
A segment of wire has a radius R= 27 mm and length L = 39 cm that carries a uniform current density J = 470 A/m2. What is the current i, flowing through a circular loop of radius r = 18.5 mm offset from the central axis of the wire by d = 3.5 mm? Express your answer using one decimal place. You answer should be in mA.
When 115 V is applied across a wire thatis 11 m long and has a 0.30
mm radius, thecurrent density is 1.3 104 A/m2. Find the resistivityof the
wire.
1·m
1. An aluminum wire having a cross-sectional area equal to 3.50 10-6 m2 carries a current of 6.50 A. The density of aluminum is 2.70 g/cm3. Assume each aluminum atom supplies one conduction electron per atom. Find the drift speed of the electrons in the wire. 0.000193452 Incorrect: Your answer is incorrect. The equation for the drift velocity includes the number of charge carriers per volume, which in this case is equal to the number of atoms per volume. How...
A 5.30 m length of 1.6 mm -diameter wire carries a 710 mA current when 18.0 mV is applied to its ends. The drift velocity is 1.2×10−5 m/s . Part A Determine the resistance R of the wire. Part B Determine the resistivity ρ. Part C Determine the current density j. Part D Determine the electric field inside the wire. Part E Determine the number n of free electrons per unit volume.
A circular loop of wire 50 mm in radius carries a current of 130 A. Find the (a) magnetic field strength and (b) energy density at the center of the loop.
Chapter 30, Problem 066 A circular loop of wire 82 mm in radius carries a current of 115 A. Find the (a) magnetic field strength and (b) energy density at the center of the loop. (a) Number Units (b) Number Units
Chapter 30, Problem 066 A circular loop of wire 78 mm in radius carries a current of 114 A. Find the (a) magnetic field strength and (b) energy density at the center of the loop. (a) Number Units (b) Number Units
A d = 3.71 mm diameter wire carries an electric current of I = 18.2 A when the electric field is E = 5.72 times 10^-2 V/m along the wire. What is the current density? What is the conductivity of the wire? What is the resistivity of the wire?
a.) A 33.9-m length of copper wire at 20.0°C has a radius of 0.31 mm. If a potential difference of 7.00 V is applied across the length of the wire, determine the current in the wire. b.) If the wire is heated to 40.0°C while the 7.00-V potential difference is maintained, what is the resulting current in the wire?
A certain cylindrical wire carries current. We draw a circle of radius r around its central axis in Figure (a) to determine the current i within the circle. Figure (b) shows current i as a function of r2. The vertical scale is set by is = 5.0 mA, and the horizontal scale is set byr2 = 5.3 mm2. (a) Is the current density uniform? (b) If so, what is its magnitude? (Vu)! m2 (mm) (b) (b) Number Units