A 1.0-m-long, 1.0-mm-diameter copper wire (mass density 8920 kg/m3 ) carries a current of 50 A to the east. Suppose you want to levitate the wire by applying an externally created magnetic field. What field strength and direction do you need?
A 1.0-m-long, 1.0-mm-diameter copper wire (mass density 8920 kg/m3 ) carries a current of 50 A...
A copper wire has diameter 0.180 mm and length 20.0 cm . It’s in a horizontal plane and carries a current of 2.05 A . The density of copper is 8920 kg/m3. A. Find the magnitude of the magnetic field needed to suspend the wire against gravity. B. Find the direction of the magnetic field needed to suspend the wire against gravity. Assume the current points east.
Consider a straight piece of copper wire of length 8 m and diameter 8 mm that carries a current I = 4.5 A. There is a magnetic field of magnitude B directed perpendicular to the wire, and the magnetic force on the wire is just strong enough to “levitate” the wire (i.e., the magnetic force on the wire is equal to its weight). Find B. Hint: The density of copper is 9000 kg/m3 .
A 0.68-mm-diameter copper wire carries a tiny current of 2.4 μA . The molar mass of copper is 63.5 g/mole and its density is 8900 kg/m3. NA=6.02×1023. Estimate the electron drift velocity. Assume one free electron per atom.
A 1.0 mm -diameter, 20 cm -long copper wire carries a 4.5 A current. What is the potential difference between the ends of the wire?
A copper wire is 2.0 mm in diameter and carries a current of 20 A.Part A.What is the electric field strength inside this wire?
A long horizontal wire carries a current of I1 = 14.5 A. A second wire, made of 0.150 mm diameter copper wire, is 90.0 cm below the first wire and is held in suspension magnetically. What is the magnitude and direction of the current in the bottom wire? Give a + sign if I2 is parallel to I1, and a - sign if I2 is opposite to I1. The mass density of Copper is 8.93×103 kg/m3. We were unable to...
A straight vertical wire carries a current of 1.0 A into the page in a region where the magnetic field strength is 0.60 T. What is the magnitude and direction of the magnetic force on a 1.0 cm section of this wire if the magnetic field direction is toward the east?
A long horizontal wire carries a current of IT = 49.1 A. A second wire (I = 5.54×103 A, parallel to IT), made of 2.30 mm diameter copper wire and parallel to the first but a distance L below it, is held in suspension magnetically, as seen in the figure below. (This means the upwards magnetic force on that lower wire is just large enough to hold it up against its own weight) What is the distance L between the...
A 2.9 mm -diameter copper wire carries a 40 A current (uniform across its cross section). a)Determine the magnetic field at the surface of the wire. b)Determine the magnetic field inside the wire, 0.50 mm below the surface. c)Determine the magnetic field outside the wire 2.5 mm from the surface.
4.A coaxial cable has an inner core of copper wire with a 3 mm diameter with a current density of 1.768E4 A/m2. The image shows a cross-sectional area of the wire. The current in the core is flowing out of the page. The core is surrounded by a thin sheath of insulating material, 1mm thick. Surrounding this is a thin cylindrical shell of copper wire 1mm thick, that carries the returning current back into the page. The copper shell is...