Physics Course/Magnet/ElectroMagnet

ElectroMagnet Introduction

It's been observed that Current carrying conductor does exhibit a Magnet's characteristic

ElectroMagnet

It's been observed that

  1. Any Coil conductor when conducts current does attract metal just like the Lodestone Magnet . Hencr the name ElectroMagnet . Current carrying conductor does exhibit the characteristic of a magnet
  2. When place a metal material in the turns of current conducting Coil of several turns the material become a magnet . Unlike ElectroMagnet, when the current is turn off or when the material is taken out of the coil's turns the material still reten its magnetic hence the name Permanent Magnet
Electromagnetism.svg

ElectroMagnet Characteristics

  • Magnetic field
The Magnetic field is made up of Magnetic field lines that travels from North Pole to South Pole that is from Positive terminal to the Negative terminal . When current is zero, ElectroMagnet does not attract metal or Magnetic field does not exist when there is no current flow . The Magetic Field Strenght is the product of The Coil's Inductance and Current .
B = L I
  • Magnetic Poles
A magnet has two "Poles" namely North Pole and South Pole correspond to the Current Polarities . North Pole correspond to Plus polarity . South Pole corresdpond to Minus polarity

Reference

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Last modified on 28 March 2013, at 15:40