College Physics

The Ampere The official definition of the ampere is: One ampere of current through each of two parallel conductors of infinite l ...

Mass spectrometry today is used extensively in chemistry and biology laboratories to identify chemical and biological substances ...

B-field: Ampere’s law: Biot-Savart law: Curie temperature: direction of magnetic field lines: domains: electromagnet: electromag ...

magnetic field strength (magnitude) produced by a long straight current-carrying wire: magnetic field strength at the center of ...

22.3 Magnetic Fields and Magnetic Field Lines Magnetic fields can be pictorially represented by magnetic field lines, the prope ...

• The force between two parallel currentsI 1 andI 2 , separated by a distancer, has a magnitude per unit length given by F l = μ ...

13.While operating, a high-precision TV monitor is placed on its side during maintenance. The image on the monitor changes color ...

Figure 22.49Two loops of wire carrying currents can exert forces and torques on one another. 25.If one of the loops inFigure 22. ...

Problems & Exercises 22.4 Magnetic Field Strength: Force on a Moving Charge in a Magnetic Field 1.What is the direction of t ...

perpendicular to the Earth’s field to make the electron moves in a straight line? (b) If this is done between plates separated b ...

37.A wire carrying a 30.0-A current passes between the poles of a strong magnet that is perpendicular to its field and experienc ...

Figure 22.58 57.Find the direction and magnitude of the force that each wire experiences inFigure 22.58(b), using vector additio ...

Figure 22.63 Integrated Concepts (a) What voltage will accelerate electrons to a speed of 6.00×10−7m/s? (b) Find the radius of ...

with which the wire must move. (b) What is unreasonable about this result? (c) Which assumption is responsible? Unreasonable Re ...

23 ELECTROMAGNETIC INDUCTION, AC CIRCUITS, AND ELECTRICAL TECHNOLOGIES Figure 23.1This wind turbine in the Thames Estuary in the ...

Learning Objectives 23.1. Induced Emf and Magnetic Flux Calculate the flux of a uniform magnetic field through a loop of arbitr ...

23.1 Induced Emf and Magnetic Flux The apparatus used by Faraday to demonstrate that magnetic fields can create currents is illu ...

Figure 23.5Rotation of a coil in a magnetic field produces an emf. This is the basic construction of a generator, where work don ...

coil hasNturns, an emf will be produced that isNtimes greater than for a single coil, so that emf is directly proportional toN. ...

Figure 23.8Recording and playback heads used with audio and video magnetic tapes. (credit: Steve Jurvetson) Similar principles a ...