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The force on a charge in a magnetic field can be calculated using the formula F = Bqv.

When a charged particle moves through a magnetic field, it experiences a force perpendicular to both the direction of motion and the direction of the magnetic field. This force is known as the Lorentz force and can be calculated using the formula F = Bqv, where F is the force, B is the magnetic field strength, q is the charge of the particle, and v is the velocity of the particle.

The direction of the force can be determined using the right-hand rule. Point your thumb in the direction of the velocity of the charged particle, your fingers in the direction of the magnetic field, and the force will be perpendicular to both.

It is important to note that the force on a charge in a magnetic field does not change the speed of the particle, only its direction of motion. This is because the force is always perpendicular to the velocity of the particle.

The magnitude of the force can be increased by increasing the strength of the magnetic field, the charge of the particle, or the velocity of the particle. This principle is used in many applications, such as particle accelerators and magnetic confinement fusion reactors.

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