Electromagnetic Induction

Which statement accurately describes the relationship between moving charges/poles and the fields they create?

• Moving electric charges create electric fields, and moving magnetic poles create magnetic fields.

• Moving electric charges create magnetic fields, and moving magnetic poles create electric fields.

• Moving electric charges create electric fields, but moving magnetic poles do not create any fields.

• Moving magnetic poles create magnetic fields, but moving electric charges do not create any fields.

When a changing magnetic flux induces an electromotive force (emf), what characteristic describes the electric field produced?

• It is always conservative, meaning the work done on a test charge around a closed path is zero.

• It is always non-conservative, meaning the work done on a test charge around a closed path is nonzero.

• It is conservative only if the magnetic field is constant.

• It is non-conservative only if the magnetic field is constant.

Which of the following factors, when changed over time, can induce an electromotive force (emf) in a closed loop?

• Only the magnitude of the magnetic field.

• Only the area enclosed by the loop.

• Only the angle between the magnetic field and the loop's area vector.

• Any combination of changes in the magnetic field magnitude, loop area, or the angle between them.

What is the fundamental process described as electromagnetic induction?

• The process of generating light from electrical energy.

• The process of inducing an electromotive force (emf) by a change in magnetic flux.

• The process of creating magnetic fields from stationary electric charges.

• The process of converting heat energy into electrical energy.