ELECTROMAGNET SMALL PARAGRAPH

ELECTROMAGNET
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferromagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.
The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.
Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks,MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel.It is alo used in electric bell as a most common example.

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electronic configuration of all elements in SPDF format

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ALL THE INFORMATION HAS BEEN TAKEN FROM WIKIPEDIA MESOPOTAMIAN CIVILIZATION Mesopotamia is a historical region of Western Asia situated within the Tigris–Euphrates river system , in the northern part of the Fertile Crescent , in modern days roughly corresponding to most of Iraq , Kuwait , the eastern parts of Syria , Southeastern Turkey , and regions along the Turkish–Syrian and Iran–Iraq borders . [1] The Sumerians and Akkadians (including Assyrians and Babylonians ) dominated Mesopotamia from the beginning of written history (c. 3100 BC) to the fall of Babylon in 539 BC, when it was conquered by the Achaemenid Empire . It fell to Alexander the Great in 332 BC, and after his death, it became part of the Greek Seleucid Empire . Around 150 BC, Mesopotamia was under the control of the Parthian Emp...

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