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Chapter 27 – Magnetic Fields and Forces

How is magnetic field related to force?
A current (I) in a magnetic field ( B) experiences a force ( F) given by the equation F = I l × B or F = IlB sin θ, where l is the length of the wire, represented by a vector pointing in the direction of the current.
The direction of the force may be found by a right‐hand rule similar to the one shown in Figure .
What are magnetic fields of force?
The magnetic force is a consequence of the electromagnetic force, one of the four fundamental forces of nature, and is caused by the motion of charges.
Two objects containing charge with the same direction of motion have a magnetic attraction force between them.
How do you find the force of a magnetic field?
The magnitude of the force on a wire carrying current I with length L in a magnetic field is given by the equation F=ILBsinθ where θ is the angle between the wire and the magnetic field.
The force is perpendicular to the field and the current.
We can remember this diagram using the right-hand rule.
If you point your pointer finger in the direction the positive charge is moving, and then your middle finger in the direction of the magnetic field, your thumb points in the direction of the magnetic force pushing on the moving charge.

How is magnetic field related to force?