Essay On Electromagnet

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1. What is an electromagnet?
An electromagnet is a magnet that is created using an electric current, created by electricity. Since electricity can be turned on and off, so can an electromagnet. It can even be weakened or strengthened by decreasing or increasing the current.

Electromagnets are created by having an iron core wound with a conductor carrying current. The strength of the electromagnet depends upon the amount of current passing through the conductor. Also the current can be easily stopped and started to form an electromagnet and de-energize respectively as per the need of the work to be performed.
Reference list to question 1 http://study.com/academy/lesson/what-is-an-electromagnet-definition-uses-parts.html http://www.brighthubengineering.com/commercial-electrical-applications/65361-how-electromagnetism-changed-our-world/ …show more content…

Give 3 uses of electromagnet and describe how each one works.
Large crane magnets - the electromagnet on the end of the crane is turned on and turns into a magnet picking and dropping metals. When it is turned off the electromagnet just turns into a normal metal

Magnetic Levitation Trains - these are high-speed trains that have powerful electromagnets to lift, guide and move them. The electromagnets lift the train to a few millimeters above the tracks. This greatly reduces friction, which is one of the main hindrances to achieving speed in any kind of transportation.

Electromagnetic Locks - A popular application of electromagnets is in security systems. Electromagnetic locks, also known as maglocks, consist of a coil of wire wrapped around a metal core. When electric current passes through the coil, the core becomes an electromagnet. It attracts a metal plate on the same side of the door. This is called an 'armature plate'. This results in 'locking' of the door. Maglocks are available in two types (depending upon mechanism of operation). These are called 'fail safe' and 'fail

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