Plss help me answer this

To create electromagnetic induction, which of the following has to move? a. a wire b. a magnet c. a transformer d. either a or b

(1 point) match the differential equations and their vector valued function solutions. you may wish to multiply at least one solution out fully, to make sure that you know how to do it. you can get the other answers quickly by process of elimination and just multiply out one row element.

How does changing the frequency affect the energy of the wave?