PHYSICS 112 - REVIEW FOR EXAM 3MAGNETIC FLUX:The magnetic flux through a plane circuit is cos , where is the angle between F))œ FEFtand the normal (perpendicular) to the plane of the circuit. Units: T-m.´2MAGNETIC INDUCTIONThe current induced in plane loop is proportional to the rate of change of the magnetic flux through theloop. If the loop has electrical resistance , the current is given by Faraday's law: .VM œ?F ?Î>VLENZ' LAWThe direction of the induced current in a loop is such as to oppose the change in flux that produced it.Thus if the flux is increasing/decreasing in magnitude, the induced current must produce a magnetic field in theopposite/same direction as the external magnetic field.ELECTROMAGNETIC WAVESA plane electromagnetic waves has electric field and magnetic field that are perpendicular to eachIFttother and always in phase (zero at same time, maxima and minima at the same time) and always both perpendicularto the direction of propagation
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