electric-bell

gun ammunition loading system

Malta Cross movement - second hand movement used to control the clock

Faraday law of induction

The propagation of a linearly polarized electromagnetic wave: the vectors of the electric field E and the magnetic field H are perpendicular to each other and to the direction of the wave propagation. In the running wave the vectors E and H oscillate in phase, i.e. they achieve the maximum value in the same points of the space.

The motion of electrons in the cathode-ray tube of an oscilloscope.

Generation of acoustic waves by loudspeaker