Given two identical iron bars, one of which is a permanent magnet and the other unmagnetized, how could you tell which is which by using only the two bars?
Answer to relevant QuestionsThe enlarged circular inset in Fig. 19.11 shows how the positive sodium ions in seawater are accelerated out the rear of the submarine to provide a propulsive force. But what about the negative chlorine ions in the seawater? ...(a) Show that the SI unit for magnetic moment multiplied by the SI unit for magnetic field yields the SI unit for torque. (b) If you are looking down onto the area of a current- carrying loop of wire and the current is ...(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) What angle(s) does a particle’s velocity have to make with the magnetic field direction for the particle to be subjected to half the maximum possible magnetic force, Fmax? (b) Express the magnetic force on a charged ...(a) Use a right-hand force rule to find the direction of the current in the wires shown in Fig. 19.36. In each case, the magnetic force direction is shown. (b) If in each case the wire is a straight segment 15 cm long ...
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