Magnetic Flux Through The Open Surface S



B: magnitude of the magnetic field (T, tesla), α: angle between B and perpendicular line to surface S.



Magnetic Forces On Moving Charges



v: velocity of the charge (m/s)




Force On A Current Carrying-Wire



I: current (A), l: length of the wire (m)



Force Between Two Parallel Current-Carrying Wire



r: distance between two wires (m)



Magnetic Field Of A Long Current Charge Wire



r: perpendicular distance from the center of the wire (m)



Magnetic Field Of A Loop



N: numbers of turns per unit length of solenoid (turns/m)



Induced Electromotive Force- Faraday's Law



N: numbers of turns per loop (turns/m)



Inductance






Electric Energy




Magnetic Energy




Electric-Magnetic Energy