* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Magnetic Force Exerted on a Current Carrying Wire Magnetic force
Friction-plate electromagnetic couplings wikipedia , lookup
Electromotive force wikipedia , lookup
Magnetic stripe card wikipedia , lookup
Edward Sabine wikipedia , lookup
Mathematical descriptions of the electromagnetic field wikipedia , lookup
Neutron magnetic moment wikipedia , lookup
Geomagnetic storm wikipedia , lookup
Magnetic monopole wikipedia , lookup
Giant magnetoresistance wikipedia , lookup
Magnetometer wikipedia , lookup
Skin effect wikipedia , lookup
Electromagnetic field wikipedia , lookup
Superconducting magnet wikipedia , lookup
Electricity wikipedia , lookup
Earth's magnetic field wikipedia , lookup
Magnetotactic bacteria wikipedia , lookup
Multiferroics wikipedia , lookup
Electromagnetism wikipedia , lookup
Magnetoreception wikipedia , lookup
Magnetohydrodynamics wikipedia , lookup
Magnetochemistry wikipedia , lookup
Ferromagnetism wikipedia , lookup
Force between magnets wikipedia , lookup
Electromagnet wikipedia , lookup
Magnetotellurics wikipedia , lookup
Zubrzycki: Magnetism 3 Magnetic Force Exerted on a Current Carrying Wire Magnetic force exerted on a current: The magnitude of the magnetic force FB on W that a magnetic field B exerts on a current I passing through a wire of length L is F B on W = ILBsinθ where θ is the angle between the directions of the B-field and the direction the Length of the wire points(which is the same direction the conventional current flows). The direction of this magnetic force is given by the right hand rule for the magnetic force. 3.1 You wonder if instead of supporting your clothesline with two poles you could replace it with a wire and then support it magnetically by running an electric current through it and using Earth’s B-field, which near the surface has magnitude 5 x 10-5 T and points north. Assume that your house is located on the island of Dominica near the equator where the B-field produced by Earth is approximately parallel to the earth’s surface. The clothesline is 10 m long and with the hanging clothes has a 2.0 kg mass. What direction should you orient the clothesline and what electric current is needed to support it? Finally, decide if this seems like a promising way to support the clothesline—no poles needed! (The wires in homes will only carry currents around 20 A before circuit breakers start to trigger for safety reasons.) 3.2 A 2.0-m long wire has a 10-A current through it. The wire is oriented south to north and located near the equator. Earth’s B-field has a 4.0 x 10-5 T magnitude in the vicinity of the wire. What is the magnetic force exerted on the wire? 3.3 An east-west power line at the equator carries 100 A of current toward the east. At this location Earth's B field has a magnitude of 3.5 x10-5 T and points north. (a) Determine the magnitude and direction of the magnetic force exerted by Earth’s magnetic field on the 230-m long 160-kg wire. (b) Compare this force to the gravitational force exerted on the line by Earth. 3.4 Summary: There are significant differences between the force caused by a magnetic field and the forces caused by gravitational and electric fields. After writing each difference, answer the question, “How do I know this?”