A magnetic field is the area in space surrounding a magnet where a magnetic force is exerted.

The magnetic field strength of an electromagnet is directly proportional to the current passing through the coil.

By convention, magnetic field lines are defined to flow from the North pole to the South pole outside the magnet.

Magnetic poles always exist in pairs; cutting a magnet creates two smaller magnets, each with its own North and South pole.

Electric motors utilize the interaction between a magnetic field and current-carrying conductors to produce rotation.

Soft iron is used because it is easily magnetized and demagnetized, making it ideal for electromagnets.

A magnetic compass needle aligns itself with local magnetic field lines, making it a reliable tool to detect their presence.

The SI unit of magnetic flux is the Weber (Wb), whereas Tesla is the unit of magnetic flux density.

The fundamental law of magnetism states that opposite poles attract and like poles repel each other.

Hans Christian Oersted observed in 1820 that a compass needle deflected when placed near a current-carrying wire, proving the link between electricity and magnetism.

For a long ideal solenoid, the magnetic field inside is approximately uniform and directed along the axis.

Steel is a magnetically hard material with high retentivity and coercivity, making it suitable for permanent magnets.

In Fleming's Left-Hand Rule, the thumb points to force, index finger to magnetic field, and middle finger to the direction of current.

Electromagnetic induction is the process of generating an electromotive force (EMF) across an electrical conductor in a changing magnetic field.

Magnetic field lines always form continuous closed loops, extending from north to south outside the magnet and south to north inside.

According to the Biot-Savart law or Ampere's Law, the magnetic field strength around a wire is inversely proportional to the distance from the wire.

The Tesla (T) is the SI unit for magnetic flux density, whereas the Weber (Wb) is the unit for magnetic flux.

Every ferromagnetic material has a specific Curie temperature; above this temperature, the material loses its permanent magnetic properties due to thermal agitation.

The Right-Hand Grip Rule states that if you grasp the wire with your right hand with your thumb in the direction of current, your fingers curl in the direction of the magnetic field lines.