The direction of any magnetic field is taken to be in the direction that a compass points. Explain why this means that magnetic field lines must leave from the north pole of a permanent bar magnet and enter its south pole.
Answer to relevant QuestionsSuppose a long, straight, current- carrying wire had a current from west to east. If it were immersed in a vertically upward magnetic field that was stronger on its west side than on its east side, what would be the initial ...(a) As you start in the very middle of Fig. 19.3b and move horizontally to the right, what happens to the magnetic field spacing as indicated by the iron filing pat-tern? What does this imply in terms of the magnetic field ...A permanent bar magnet (# 1) is vertically oriented so that its north end is below its south end. The north end of this magnet feels an upward magnetic force of 1.5 mN from an identical vertically oriented magnet (# 2) that ...In a mass spectrometer, a doubly charged ion having a particular velocity is selected by using a magnetic field of 100 mT perpendicular to an electric field of 1.0 kV/m. This same magnetic field is then used to deflect the ...A wire carries a current of 10 A in the +x-direction. (a) Find the force per unit length on the wire if it is in a magnetic field that has components of Bx = 0.020 T, By = 0.040 T, and Bz = 0 T. (b) Find the force per unit ...
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