III. Producing Electric Current

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Presentation transcript:

III. Producing Electric Current Ch. 22 - Magnetism III. Producing Electric Current (p.633-639) Electromagnetic Induction Electric Generator DC & AC Transformer 1

A. Electromagnetic Induction producing a current by moving a wire through a magnetic field Dynamic Microphone Coil

B. Electric Generator Electric Generator mechanical energy  electrical energy a device that produces electric current by rotating a coil of wire in a magnetic field GENERATOR MOTOR

C. DC & AC Direct Current (DC) current flows in one direction dry cells Alternating Current (AC) current reverses its direction at regular intervals electrical outlets

D. Transformer Transformer increases or decreases Alternating Current voltage

D. Transformer Step-up Transformer Step-down Transformer increases the voltage more turns power plants Step-down Transformer decreases the voltage fewer turns household appliances (hairdryers, etc.)