Magnetic Effects of Current

Magnetic Field A magnetic field is a vector field that describes the magnetic effect on moving electric charges, electric currents and magnetic substances. A mobile charge in a magnetic field experiences a force perpendicular to the velocity of the mobile charge and to the magnetic field.  A permanent magnet’s magnetic field pulls on ferromagnetic substances […]

Toroid is a doughnut-shaped hollow circular ring with several turns of insulated wire twisted so close together that there is no room between them. When high inductances are required at low frequencies, a toroid can be thought of as a circular solenoid utilized in an electric circuit as an inductor. Michael Faraday, a physicist, invented the

A self-exciting dynamo process in the fluid outer core generates the Earth’s magnetic field. The magnetic field is created by electrical currents running through the slowly moving molten iron. In addition, external sources, including but not limited to the ionosphere and magnetosphere, also contribute to the geomagnetic field observable at the Earth’s surface. There are

A solenoid is just a coil of wire that forms a cylindrical shape. When an electric current is passed through a solenoid, it tends to adopt the magnetic properties in which electricity is changed to magnetism and then again changed into electricity. The shape of the solenoid reassembles the shape of the bar magnet and

Introduction to Ampere’s law Ampere’s law is one of the significant laws of electromagnetism, which states that “The attractive field generation due to electric flow becomes relative to the size of the electric flow with a consistent proportionality equivalent to the permeability of free space”. This law allows us to keep an appropriate extension to

A permanent magnet is a type of material that has its own magnetic properties and creates its own magnetic field. Materials such as iron, steel, nickel, cobalt etc., that are strongly attracted towards a magnet within a certain distance are called ferromagnetic. Some of them are naturally occurring, like loadstones. A ferromagnetic material is divided

Paramagnetic substances get weakly magnetised or tend to get weakly magnetised along the direction of an externally applied magnetic field. Upon removing the magnetic field, the substance subsequently gets non-magnetized. They tend to have a permanent magnetic moment or a permanent dipole throughout. They have unpaired electrons in them. The net dipole in these substances

What are Eddy Currents? Eddy currents are produced due to changes in the magnetic field. In other words, we can say that when the magnetic flux is flowing inside a coil, eddy currents are formed. These currents are created by the concept of electromagnetic induction. They are always present in closed loops. This is the

Magnetism is the force that acts on the area around a magnet or moving electric charge where there is magnetism. Magnets, electric currents, and changing electric fields can produce magnetic fields in their vicinity. Electromagnetic fields are produced by moving electric charges and the intrinsic uniform magnetic field moments associated with elementary particles’ fundamental quantum

In 1820, French scientist Christian Oersted observed that the compass needle deflected from its initial direction, which is the north-south direction, in the presence of current-carrying wire. Oersted’s experiment is the first, which describes that current-carrying wire produces a magnetic field. The setup requires a planar coil of wire to deflect the magnetic needle vigorously