Magnetism: Types and Definition

Definition of Magnetism

Magnetism is a physical phenomenon produced by the interaction of magnetic fields, which are created by the motion of charged particles, such as electrons.

Types of Magnetism

• Permanent Magnetism: A natural magnet that retains its magnetic field forever, e.g., iron, nickel, and cobalt.
• Electromagnetism: A magnetic field created by an electric current, e.g., coils, solenoids, and electromagnets.
• Temporary Magnetism: A material that becomes magnetized only when in the presence of an external magnetic field, e.g., soft iron, nickel, and cobalt.

Magnetic Fields

• A region around a magnet or electric current where the magnetic force can be detected.
• Magnetic fields are created by the motion of charged particles.
• Magnetic fields are measured in units of tesla (T).

Magnetic Forces

• A force that arises from the interaction between magnetic fields and moving charges or other magnetic fields.
• Magnetic forces can be attractive or repulsive.
• Magnetic forces are responsible for the alignment of magnetic dipoles.

Magnetic Dipoles

• A pair of magnetic poles, a north pole and a south pole, separated by a small distance.
• Every magnet has two poles, which cannot exist independently.
• Like poles (north-north or south-south) repel each other, while opposite poles (north-south) attract each other.

Applications of Magnetism

• Electric Motors: Convert electrical energy into mechanical energy.
• Generators: Convert mechanical energy into electrical energy.
• Magnetic Resonance Imaging (MRI): Uses strong magnetic fields and radio waves to create images of the body.
• Magnetic Storage: Uses magnetic fields to store data on devices such as hard drives and magnetic strips.

Definition of Magnetism

• Magnetism is a physical phenomenon produced by the interaction of magnetic fields, created by the motion of charged particles like electrons.

Types of Magnetism

• Permanent Magnetism: a natural magnet that retains its magnetic field forever, e.g., iron, nickel, and cobalt.
• Electromagnetism: a magnetic field created by an electric current, e.g., coils, solenoids, and electromagnets.
• Temporary Magnetism: a material that becomes magnetized only when in the presence of an external magnetic field, e.g., soft iron, nickel, and cobalt.

Magnetic Fields

• A region around a magnet or electric current where the magnetic force can be detected.
• Created by the motion of charged particles.
• Measured in units of tesla (T).

Magnetic Forces

• A force that arises from the interaction between magnetic fields and moving charges or other magnetic fields.
• Can be attractive or repulsive.
• Responsible for the alignment of magnetic dipoles.

Magnetic Dipoles

• A pair of magnetic poles, a north pole and a south pole, separated by a small distance.
• Every magnet has two poles, which cannot exist independently.
• Like poles (north-north or south-south) repel each other, while opposite poles (north-south) attract each other.

Applications of Magnetism

• Electric Motors: convert electrical energy into mechanical energy.
• Generators: convert mechanical energy into electrical energy.
• Magnetic Resonance Imaging (MRI): uses strong magnetic fields and radio waves to create images of the body.
• Magnetic Storage: uses magnetic fields to store data on devices such as hard drives and magnetic strips.