Imagnethi emile okwesangqa igxininiswe kwiDC motor, kwaye yangoku idlula kwi-coil kwi-rotor ukuvelisa amandla e-ampere. Xa i-coil kwi-rotor ihambelana nentsimi yamagnetic, isalathiso se-magnetic field siya kutshintsha ukuba siqhubeka sijikeleza. Ngoko ke, i-brush ekupheleni kwe-rotor iguqulwa kunye Iipleyiti zixutywe ngokutshintshile, ukwenzela ukuba isalathiso sangoku kwikhoyili siphinde sitshintshe, kwaye isalathiso samandla e-Lorentz avelisiweyo ayitshintshi, ngoko i-motor ingaqhubeka ijikeleza kwicala elinye.
Umgaqo wokusebenza weDC generatorkukuguqula amandla e-electromotive alternating efakwe kwikhoyili ye-armature ibe yi-DC electromotive force xa itsalwa ukusuka ekupheleni kwebrashi ngumhambisi kunye nesiphumo sokutshintshwa kwebrashi.
Isalathiso samandla e-electromotive esenziwayo simiselwa ngokomthetho wesandla sasekunene (umgca wemagnethi ukhomba entendeni, ubhontsi ukhomba kwicala lokuhamba komqhubi, kunye neminye iminwe emine ikhomba kwicala le-electromotive force induced in conductor).
Ulwalathiso lwamandla kumqhubi lunqunywe ngumthetho wesandla sasekhohlo. Esi sibini samandla ombane senza itorque esebenza kwi-armature, ebizwa ngokuba yitorque yombane kumatshini wombane ojikelezayo. Isalathiso se-torque sichasene ne-clockwise, kumzamo wokwenza i-armature ijikeleze i-clockwise. Ukuba le torque ye-electromagnetic inokoyisa itorque yokumelana kwi-armature (efana netorque yokumelana ebangelwa kukungqubana kunye nezinye iitorque zomthwalo), i-armature inokujikeleza kwicala elichasene newotshi.