94CHAPTER 17 (c) The filament is tightly coiled to fit the required length into a small space(d) From ()001TTα=+−LL, where ()164.510Cα−−=×°, the length at is 020 CT=°()()()()0025 m114.510CLLTTα−===+−+×°1626 mC2 600 C20−°°−17.60Each speaker has a resistance of 4.00 R=Ωand can handle 60.0 W of power. From , the maximum safe current is 2I R=Pmax60.0 W4.00 R==Ω√3.87 A=IThus, the system is not adequately protectedby a 4.00 A fuse. 17.61The cross-sectional area of the conducting material is ()22outerinnerArrπ=−Thus, ()()()()5222223.510 m4.010m1.210m0.5010mLRAρπ−−−×Ω⋅×==Ω×−×73.710 37 M
This is the end of the preview.
access the rest of the document.