Fundamental Physics/Electricity/Electromagnet

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Oerst discovered that non zero current flows in electric conductor will generate magnetic field just like magnetic field of a magnet has the capability to attract metal in the invincity

For a straight line conductor Manoderecha.svg
For a circular loop made from straight line conductor Magnetic field of wire loop.svg
For a coil of N circular loops made from straight line conductor Solenoid-1.png