Table of Contents
What are the conditions for magnetic force?
1. The charge must be moving. 2. The velocity of the charge must have a component that is perpendicular to the direction of the magnetic field.
What causes a magnetic force in a wire?
When a wire is moved in a magnetic field, the field induces a current in the wire. Conversely, a magnetic field is produced by an electric charge in motion. This is in accordance with Faraday’s Law of Induction, which is the basis for electromagnets, electric motors and generators.
What causes magnetic field?
Instead, Earth’s magnetic field is caused by a dynamo effect. On Earth, flowing of liquid metal in the outer core of the planet generates electric currents. The rotation of Earth on its axis causes these electric currents to form a magnetic field which extends around the planet.
How magnetic force is produced?
Magnetism is the force exerted by magnets when they attract or repel each other. Magnetism is caused by the motion of electric charges. To become magnetized, another strongly magnetic substance must enter the magnetic field of an existing magnet. The magnetic field is the area around a magnet that has magnetic force.
The magnetic force F is proportional to the charge and to the magnitude of velocity v times the magnetic field B. Depending on the initial orientation of the particle velocity to the magnetic field, charges having a constant speed in a uniform magnetic field will follow a circular or helical path.
Why do magnetic fields exert forces?
Magnets exert forces and torques on each other due to the rules of electromagnetism. The forces of attraction field of magnets are due to microscopic currents of electrically charged electrons orbiting nuclei and the intrinsic magnetism of fundamental particles (such as electrons) that make up the material.
What makes a magnetic field stronger?
When the electric current moves through a wire, it makes a magnetic field. If you coil the wire around and around, it will make the magnetic force stronger, but it will still be pretty weak. Putting a piece of iron or steel inside the coil makes the magnet strong enough to attract objects.