Electricity and magnetism

17. Since the time of Plato it has been customary to regard as material everything that manifests itself through action.

The situation with thermonuclear power today is rather curious and has features in common with the “space race” that once began.

The company CERN began its existence in the distant year 1987.

One of the little-studied natural phenomena is ball lightning.

One of the senses used by man is hearing.

In the understanding of many people, man on Earth is the master, the ruler, God's creation, with everything on the planet, and partly beyond it in the Universe, at his disposal.

Over the wetlands in the south-western part of Lake Maracaibo an unforgettable sight can be seen: a powerful and almost continuous thunderstorm, with up to 20000 lightning flashes in a night.

St Elmo's fire is a kind of continuous spark discharge.

However funny it may sound, a perpetual motion machine has already been invented.

Scientists continue to study lightning, yet nature holds a still more unusual phenomenon.

The very name of such materials seems to be taken from science fiction.

It seems that modern physics has studied everything everywhere.

The Bermuda Triangle has been stirring the minds of scientists for many years.

the ohm, the volt, the ampere and others, established for practical electrical measurements by the 1st International Congress of Electricians (1881).

(Avogadro's number) - the number of structural elements (atoms, molecules, ions or other particles) in 1 mole.

Autoionisation (field ionisation) , the process by which atoms and molecules of a gas are ionised in strong electric fields.

An instrument for measuring quantity of electricity in short current pulses.

Baryon charge (baryon number, B), one of the internal characteristics of elementary particles, different from zero for baryons and equal to zero for all other particles.

Baryons (from the Greek barys — heavy), a group of “heavy” elementary particles with half-integer spin and a mass not less than the mass of the proton.

Barkhausen effect - a stepwise change in the magnetisation of ferromagnets under a continuous change in external conditions, for example a magnetic field.