Electricity & Magnetism


Atoms

Have neutrons, protons, and electrons.

Protons are positively charged

Electrons are negatively charged

Electrons

Are located on the outer edges of atoms they can be moved.

A concentration of electrons in an atom creates a net negative charge.

Static Electricity

The build up of an electric charge on the surface of an object.

The charge builds up but does not flow.

Static electricity is potential energy. I ....etc

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reverse magnetism technical seminar with ppt

The Earth has a magnetic field, as can be seen by using a magnetic compass. It is mainly generated in the very hot molten core of the planet and has probably existed throughout most of the Earth's lifetime. The magnetic field is largely that of a dipole, by which we mean that it has one North pole and one South pole. At these places, a compass needle will point straight down, or up, respectively. It is often described as being similar in nature to the field of a bar (e.g. fridge) magnet. However the ....etc

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Hardware for image processing - Basics Eye Human vision sensor

History

Photography appeared in XIX century.
Ideas for developing fax machines and usage of telegraphic lines for
image submission was born during the World War I.
The idea about TV development was born around 1930.
The key event in digital image processing was development of the
first electronic computing machines. These machines enabled simple
and fast image processing.
The second important event was astronomical exploration ....etc

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Abstract

Magnets have been known for centuries.
The Chinese and Greeks knew about the magical properties of magnets. The ancient Greeks used a stone substance called magnetite. They discovered that the stone always pointed in the same direction. Later, stones of magnetite called lodestones were used in navigation.

William Gilbert, an English physician, first proposed in 1600 that the earth itself is a magnet, and he predicted that the Earth would be found to have magnetic poles.



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