Induced Voltages and Inductance189(c) The emf is first maximum at 0.50 s0.13 s44T===t20.36Treating the coiled telephone cord as a solenoid, ()2272206410TmA70.01.301040.600 m1.3610H1.36 HNALπµ−−−×⋅×=×=A20.37-32av1.50 A0.20 A3.0010 H2.010V20 mV0.20 sILt−∆−==×=× =∆E20.38The units of BNIΦare 2TmA⋅From the force on a moving charged particle, FqvB=, the magnetic field is FBand we find that qv=NN1 T11Cmss⋅⋅⋅Thus, ( )22Nm sNsJmCC⋅⋅==⋅s Vs⋅=⋅
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This note was uploaded on 12/09/2011 for the course PHYS 2020 taught by Professor Staff during the Fall '10 term at FIU.