The force on a current carrying wire is maximum only when the wire is perpendicular to the direction of magnetic field. It is minimum, that is, no force acts on the conductor when it is parallel to the magnetic field.

The force experienced by a current carrying conductor placed in a magnetic field is the maximum when the conductor is kept perpendicular to the direction of the magnetic field.

A current carrying conductor kept in a magnetic field experience force because a magnetic field is produced by an electric current that flows through a conductor. This magnetic field exerts a force that is equal in magnitude and opposite in direction.

The force experienced by a current-carrying conductor is the maximum when the direction of current is perpendicular to the magnetic field’s direction.

If the current direction is PARALLEL to the magnetic field, there will NO force on the conductor by the magnetic field. The magnitude of the force is MAXIMUM when the angle between the magnetic field and current direction is 90∘ .

Two different vectors are in use to represent a magnetic field: one called magnetic flux density, or magnetic induction, is symbolized by B; the other, called the magnetic field strength, or magnetic field intensity, is symbolized by H.

Magnetic fields are produced by electric currents, which can be macroscopic currents in wires, or microscopic currents associated with electrons in atomic orbits. The magnetic field B is defined in terms of force on moving charge in the Lorentz force law.

A magnetic compass points to the earth’s magnetic poles, which are not the same as earth’s geographic poles. When it comes to magnets, opposites attract. This fact means that the north end of a magnet in a compass is attracted to the south magnetic pole, which lies close to the geographic north pole.

Tesla is the unit of measurement to define the magnetic flux density. This is a unit of measurement on the International System of Units, which is the metric system. One tesla is the same as one weber (the representation of magnetic flux) per square meter. One tesla is equal to 10,000 gauss.

3T MRI, or 3 Tesla MRI, uses very powerful magnets that produce a 3-tesla magnetic field. A 3-tesla magnetic field is twice as powerful as the fields used in conventional high-field MRI scanners, and as much as 15 times stronger than low-field or open MRI scanners. This results in a clearer and more complete image.

Safety remains a significant concern in the world of MRIs, and under strict safety guidelines patients can be scanned equally as safe in both 1.5T and 3T systems in most circumstances. The Cons: Patients with implants or devices are safest in a 1.5T magnet. Patients who are pregnant should also avoid 3T systems.