PY 212 Study Guide - Midterm Guide: Magnetic Monopole, True North
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Chapter 20: positive charge flow, out of positive battery terminal, energy costs. I(cid:2928)m(cid:2929)= (cid:883)(cid:884)i(cid:2868: use dc e(cid:395)uatio(cid:374)s (cid:894)oh(cid:373)"s law a(cid:374)d powe(cid:396)(cid:895), (cid:271)ut (cid:271)e (cid:272)o(cid:374)siste(cid:374)t with su(cid:271)s(cid:272)(cid:396)ipts. Circuit protection: protective devices: fuses; circuit breakers, types of faults: short circuit; overload; ground fault. Series and parallel: properties and behavior of series and parallel circuits. (cid:1844)(cid:3046)(cid:3032)(cid:3045)(cid:3032)(cid:3046)=(cid:1844)(cid:2869)+(cid:1844)(cid:2870)+(cid:1844)(cid:2871)+ (cid:883)(cid:1844)(cid:3043)(cid:3045)(cid:3032)=(cid:883)(cid:1844)(cid:2869)+(cid:883)(cid:1844)(cid:2870)+(cid:883)(cid:1844)(cid:2871)+ . Power supplies: for current out of the positive terminal: Meters: voltmeters have a very large resistance, voltmeters are connected in parallel, ammeters have a very small resistance, ammeters are connected in series. =(cid:1844)(cid:1829) (cid:1869)=(cid:1843)(cid:2868)(cid:4666)(cid:883) (cid:1857) (cid:3047) (cid:4667) (cid:1869)=(cid:1843)(cid:2868)(cid:1857) (cid:3047: charging circuit, discharging circuit, when capacitors are fully charged, the current is zero. Magnetism: opposite poles attract; like poles repel, dipoles only; no magnetic monopoles, circular path: Magnetic force on a current (wire): direction using rhr #1, velocity selector: (cid:1832)(cid:3003)=(cid:1869)(cid:1828)(cid:1871)(cid:1866)(cid:4666)(cid:4667) Magnetic fields from currents: (cid:1828)(cid:3046)(cid:3047)(cid:3045)(cid:3034) (cid:3047) (cid:3045)(cid:3032)=(cid:2868)(cid:884)(cid:2024)(cid:1870) (cid:1828)(cid:3030)(cid:3042)=(cid:2868)(cid:884)(cid:1870) (cid:1828)(cid:3046)(cid:3042)(cid:3032)(cid:3041)(cid:3042)(cid:3031)=(cid:2868)(cid:1866) =(cid:1827)(cid:1828)(cid:1871)(cid:1866)(cid:4666)(cid:4667: direction using rhr #1, direction using rhr #2 (cid:1866)=
