All Flashcards
What is the effect of a changing magnetic flux through a loop of wire?
It induces an electromotive force (EMF), which can drive an electric current.
What is the effect of moving a charge through a magnetic field?
The charge experiences a magnetic force, described by the Lorentz force law.
What happens when a coil rotates in a magnetic field?
Mechanical energy is converted into electrical energy, generating electricity (as in a generator).
What are the key differences between electric and magnetic forces?
Electric Force: Acts on any charge, whether moving or stationary; parallel to the electric field. Magnetic Force: Acts only on moving charges; perpendicular to both the magnetic field and the velocity of the charge.
Differentiate between Monopole and Dipole Fields.
Monopole Field: Field produced by a single magnetic charge (theoretical). Dipole Field: Field produced by two opposite magnetic poles (like in a bar magnet).
How do you determine the direction of the magnetic field around a current-carrying wire?
Use the right-hand rule: point your thumb in the direction of the current, and your fingers curl in the direction of the magnetic field.
How do you determine the direction of the magnetic force on a moving positive charge?
Use the right-hand rule: point your fingers in the direction of the velocity, curl them towards the magnetic field, and your thumb points in the direction of the force.