HWK37s_11G - electric field(i.e in the same direction as...

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HWK 37 (SOLUTIONS) (due 4/26/07) Read chp. 36 sections 4-7 Do 8, 10, 11, 13, 25 8. A piece of iron has domains; regions of aligned spins. Since the domains are randomly aligned, their magnetic fields, on average, cancel out. When an external magnetic field is applied to the iron (either from a current or from a magnet), many spins are forced into alignment giving rise to a magnetic field. The iron is now magnetized. 10. The magnetic field lines of a field due to a current carrying wire form concentric circles about the wire. 11. The right hand rule will show you that the magnetic field lines from all parts of the wire loop reinforce each other inside the loop. 13. The force on a charged particle due to an electric field is parallel to the
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Unformatted text preview: electric field (i.e. in the same direction as the field if the charge is +, and in the opposite direction if the charge is -). The force on a moving charged particle due to a magnetic field is perpendicular to both the magnetic field and to the particle’s velocity. Remember, a charged particle must be moving in order to feel a force due to a magnetic field. 25. If a piece of iron is placed in a current carrying coil, the magnetic field strength will be greatly increased inside the coil. The field due to the coil puts the spins in the iron into alignment. The newly aligned spins give rise to a magnetic field which reinforces the original field. 1...
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