LEADER 02171ngm 2200445Ia 450 001 9910557196203321 005 20120926151047.0 035 $a(CKB)4920000000392624 035 $a(FOD)100040298 035 $a(EXLCZ)994920000000392624 071 40$a40298$bInfobase 071 40$a40384s$bInfobase 100 $a20240702c2007uuuu -u- v 101 0 $aeng 135 $aurcnannnuuuuu 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 00$aDC motors /$fVideo Education Australasia 210 3 $aNew York, N.Y. $cInfobase$d[2009], c2007 215 $a1 streaming video file (25 min.) $csd., col., digital file. +$einstructional materials (online) 225 1 $aDirect Current: Understanding DC Electricity 327 $aElectricity and Magnetism (4:20) -- Magnetism and Movement (3:05) -- DC Motors: Useful Motion (4:18) -- How to Make a DC Motor (2:54) -- DC Motors: Design Improvement (4:38) -- Applications of DC Motors (4:57) 330 $aShowing how interactions between magnetic fields lead to the production of motion, this program introduces viewers to the inner workings of DC motors. Topics include the work of Hans Christian Oersted, the creation of the first electric motor by Michael Faraday, and the rules for predicting field direction and forces on current carriers. The construction of a simple DC electric motor is shown with helpful graphics and 3-D animation sequences explaining the purpose of the commutator and other components of a DC motor. Also studied are various applications of DC motors, versions of brushless DC motors, and the Right Hand Slap Rule. 410 0$aDirect current. 606 $aElectricity$xStudy and teaching 606 $aElectricity 606 $aMagnetism 608 $aEducational films. 608 $aInternet videos. 608 $aVideorecording.$2local 615 0$aElectricity$xStudy and teaching. 615 0$aElectricity. 615 0$aMagnetism. 712 02$aFilms for the Humanities & Sciences (Firm) 712 02$aVideo Education Australasia. 801 0$bAzPhAEM 906 $aVIDEO 912 $a9910557196203321 996 $aDC Motors$92826761 997 $aUNINA