Magnetic fields are areas of space where magnetic forces are present. They are created by moving electric charges and can be found around magnets, electric currents, and even the Earth.
Magnetic fields work by exerting forces on other magnetic objects. These forces can either attract or repel depending on the orientation of the objects' poles. The strength of the force is determined by the strength of the magnetic field and the distance between the objects.
Magnetic fields can be measured using a device called a magnetometer. This instrument detects the direction and strength of a magnetic field and can be used to map out the field in a particular area.
Magnetic fields have many practical applications. They are used in motors and generators to convert energy into motion, in compasses for navigation, and in MRI machines for medical imaging. They are also used in data storage devices such as hard drives and credit cards.
Most magnetic fields found in daily life are harmless to humans. However, high levels of exposure to strong magnetic fields, such as those found in MRI machines, can have health effects. To protect yourself, follow safety guidelines and avoid spending long periods of time in close proximity to strong magnetic fields.
