1.Electricity 2.Magnetism 3.Electromagnetism CLASSICAL PHYSICS Electricity & magnetism.

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Presentation transcript:

1.Electricity 2.Magnetism 3.Electromagnetism CLASSICAL PHYSICS Electricity & magnetism

Forces of nature Gravity Electromagnetism Nuclear (Strong & Weak) Projectiles Planets Galaxies Universe Light Atoms Technology Nucleus Radioactivity Stars

Electric Force Attraction or repulsion between objects with charge Increases with charge of object(s) Decreases with distance between objects Same rules everywhere in the universe

Electric Force (=> acceleration) Constant Direction, increasing speed e.g. Light bulb activation by electric current Changing Direction, constant speed e.g. atomic stability from orbiting charge

Magnetic Force Attraction or repulsion between moving objects with charge Increases with relative speed of object(s) Decreases with distance between objects Same rules everywhere in the universe

Magnetism inside atoms Magnetism from electric current Electric current from magnetism

Maxwell’s equations encapsulate all electric and magnetic phenomena (still) Who is really moving? Relative motion --> Electricity = Magnetism Einstein: Maxwell’s equations inconsistent with Galilean Relativity (1 ± 1 rule for speeds) --> Beginning of modern physics

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