Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Electromagnetism
Document related concepts
Transcript
ELECTROMAGNETISM ELECTROMAGNETISM ????? ELECTROMAGNETISM THE BRANCH OF PHYSICS THAT DEALS WITH THE RELATIONSHIP BETWEEN ELECTRICITY & MAGNETISM MAGNETIC PHENOMENON ELECTROMAGNETISM DAVY’S EXPERIMENT OERSTED’S EXPERIMENT ANY CHARGE IN MOTION CREATES MAGNETIC FIELD MOVING ELECTRONS INDUCE MAGNETIC FIELD DETERMINING THE DIRECTION OF THE MAGNETIC FIELD AROUND CURRENT CARRYING CONDUCTOR THUMB-DIRECTION OF ELECTRONS FLOW FINGERS—MAGNETIC FLUX LINES COIL OF WIRE IS CALLED HELIX COIL OF WIRE CARRYING ELECTRICAL CURRENT IS CALLED SOLENOID SOLENOID’S MAGNETIC FIELD ELECTROMAGNET= SOLENOID + IRON CORE ELECTROMAGNET ELECTROMAGNET vs SOLENOID ELECTROMAGNET SOLENOID ELECTROMAGNETIC INDUCTION: AN ELECTRIC CURRENT IS INDUCED IN IN A CIRCUIT IF SOME PART OF THIS CIRCUIT IS IN A CHANGING MAGNETIC FIELD E.M. INDUCTION STATIONARY CONDUCTOR + MOVING MAGNET STATIONARY MAGNET + MOVING CONDUCTOR ELECTROMAGNET WITH A/C CURRENT + STATIONARY CONDUCTOR STATIONARY MAGNET MOVING MAGNET MOVING MAGNET ELECTROMAGNET WITH A/C METAL DETECTOR FARADAY’S LAW MAGNITUDE OF INDUCED CURRENT DEPENDS ON THE STRENGTH OF MAG. FIELD THE VELOCITY OF MAG. FIELD THE ANGLE OF THE CONDUCTOR TO THE MAG. FIELD THE NUMBER OF TURNS IN THE CONDUCTOR SPEED FAST –E.M.F ANGLE ANGLE –E.M. # OF COILS STRONGER WEAKER LEFT HAND DYNAMO RULE S N e ELECTRON FLOW DIRECTION DIRECTION OF e DIRECTION OF e ELECTRIC GENERATOR ( DYNAMO)—A DEVICE THAT CONVERTS MECHANICAL ENERGY TO ELECTRICAL ENERGY BY E.M. INDUCTION GENERATOR COMPONENTS A POWERFUL MAGNET AN ARMATURE (WIRE LOOP) GENERATORS D/C A/C D/C GENERATOR COMMUTATOR RING D/C POWER FROM BATTERY I TIME A/C GENERATOR A/C FREQUENCY IN THE US – 60 Hz ELECTRIC MOTOR-A DEVICE THAT CONVERTS ELECTRICAL ENERGY TO MECHANICAL ENERGY TYPES OF MOTORS D/C ( COMMUTATOR RING!!) A/C D/C MOTOR A/C MOTORS SYNCHRONOUS ( REVERSE OF GENERATOR) INDUCTION INDUCTION MOTOR ROTATES THE ANODE IN THE MODERN X-RAY TUBES INDUCTION MOTOR ROTOR STATOR PRINCIPLE OF OPERATION RIGHT HAND MOTOR RULE COMPARISON – GENERATOR vs MOTOR
