According to the atomic model of Niel Bohar, the electrons which are having negative charge are revolving around the nucleus of an atom that is positively charged. This movement is in the circular orbit having the radius r. The revolving of electrons is in the closed path that constitutes the electric current. If the motion … Read more

Foucault’s current is also known as eddy current which are loops of electric current induced within conductors by changing magnetic field in conductor according to Faraday’s law of induction. When there is a discussion about eddy current first thing mentioned is that it flows in closed loop within the conductor in planes perpendicular to the … Read more

Magnetic Field Intensity Due to AMagnetic Dipole (bar magnet) Along its Axis and Perpendicular to its Axis In physics the magnetic field intensity is also called as magnetic field strength. The magnetic field is created by the current-carrying wires. According to the law of Biot-Sarvat, the magnetic field at any point due to the element … Read more

For understanding how the bar magnet is becoming equivalent to the solenoid, it is extremely important to understand the bar magnet and solenoid and the similarities and differences between them. The bar magnet is a rectangular or square piece of an object that is made from iron or steel that is having permanent magnetic properties … Read more

Terms like self and mutual induction come from inductance. Inductance is a tendency in electromagnetism and electronics in which an electrical conductor opposed a change in the electric current following through it as the flow of electric current creates a magnetic field around the conductor whose strength depends upon the magnitude of the current. Electromagnetic … Read more

Diamagnetic Substances These substances are weakly magnetized, when they are placed in the external magnetic field, in a direction that is opposite to the applied field. The magnetism that is exhibited by these substances is known as the diamagnetism. The examples of these substances are silver, bismuth, gold, copper, mercury, lead, air, water, nitrogen, hydrogen, … Read more

There is a transfer of heat from the inner solid core to the outer liquid core and it causes the convention of liquid iron of outer core. As iron is metal and it is a good conductor of electricity, so, its motion causes the generation of the magnetic field. The magnetic field of the earth … Read more

For describing the magnetic field of the earth, three magnetic elements are of significant importance. They include the angle of declination, dip, and the horizontal component of the earth’s magnetic field. The magnetic declination is the angle of the horizontal plane, which is between the magnetized compass needle points and the magnetic north. The variation … Read more

When Einstein was a child, he was much fascinated by compass, and his ability for deep thinking and nuclear understanding distance, magnetic and gravitational forces, enabled him to discover the theory of relativity. As the magnetic forces are acting at some distance, so for the representation of magnetic forces, the magnetic field can be defined. … Read more

Electromagnets and Factors Affecting Their Strengths The electromagnets are fundamental and useful devices as they are producing the controllable amount of magnetic force from the electric current. The strong magnets are cool and they have many turns of wire in the coil and are using larger amounts of current. Description of Factors Number of Coils  … Read more