1) Many electricity- related discoveries such as the invention of the electrostatic generator classification of conductors and insulators ... by the 17th century.
a) were made
b) have been made
c) had been made
2) The 1st Tidal Power Plant (TPP) in our country using the power of seas and oceans at
the Barents sea inside the Arctic Circle for 5 years
a) was building
b) has built
c) has been built
3) After the TPP (Tidal Power Plant)
and the equipment set up it was towed by the sea, 100
km away, to be placed on the sand-gravel platform prepared by divers.
a) was constructed
b) has been constructed
c) had been constructed
4) The world's third biggest Tidal Power Plant at Swansea Bay in the UK involving the
construction of breakwater facilities by 2022.
a) will be completed;
b) will have been completed;
c) will have completed
5) Among sources of renewable energy, tidal energy
from relatively high cost and limited
availability of sites with sufficiently high ranges or flow velocities.
a) has suffered;
b) is suffered
c) have suffered
6) According to the declaration * coal's bottom line" of UN, 20 countries from Europe,
America and Africa
generating energy from coal in 10 years.
a) will stop
b) stopped
c) will have stopped
7) Some researchers and archeologists stated that ancient ceramic pot with a set of copper sheets
and a rod of iron dated 600 A.D. ... a battery, galvanic cell for electroplating or electrotherapy.
a) were
b) had been
c) have been
8) Benjamin Franklin is acknowledged as an outstanding scientist a founder of the theory of
atmospheric electricity and the inventor of a means of protecting against the disastrous effect of
lightning -the rod. Since that time he ...a great public figure.
a) has become
b)has became
c) had become
9) International group of specialists that has developed a project "Green Sahara" simulated lots
of situations. To see the risks a great deal of experiments ... before.
a) had been carried out
b) have been carried out
c) were carried out
10) Researchers from Meryland University are ready to present a project about grand works in
the Sahara . The biggest in the world desert , green area by means of wind and solar farms in 40
yeas. They are absolutely sure.
a) will be turned into
b) will turn into
c) will have been turned into

It is widely known for its contribution to the creation of alternating current devices, multiphase systems, synchronous generator and asynchronous motor, which made it possible to make the so-called second stage of the industrial revolution. He is also known as a supporter of the existence of the ether thanks to its numerous tests and experiments, which aimed to show the existence of the ether as a special form of matter, amenable to use in the art. Name N. Tesla named unit of measurement of magnetic flux density (magnetic induction). Among the many awards of the scientist-medal E. Cresson, J. Scott, T. Edison. Contemporary biographers consider Tesla "the man who invented the XX century" and "Holy intercessor" of modern electricity.

Nikola Tesla (10.07.1856 - 07.01.1943) - Serbian scientist

Nikola Tesla was a remarkable scientist. He was a Serbian inventor of Austro-Hungarian origin who developed the field of electrical engineering. At the same time he was a great physicist and supporter of modern electricity. Contemporaries called him “the man who invented the 20th century”, as his experiments somehow led to the next level of industrial revolution.

Tesla was born in a small village Smilijan, which is now in Croatia, on July 10, 1856, in the family of an Orthodox priest. Regardless his father’s wish to see Nikola as a priest, the future scientist was always convinced he wanted to become an engineer. In 1882 he graduated from a prestigious university in Graz. By that time he was already invited to work in Paris for one large corporation.

Soon he presented his first electric motor and got acquainted with Th. Edison. The later invited him to New York to work as an engineer, which was more than pleasant for the young inventor. Unfortunately the two talented inventors couldn’t work together and Tesla decided to quit. In 1888 he settled his own company and sold over 40 patents for large sums of money. Finally, he was financially free at the extent that he could devote more time to his beloved experiments.

Almost 7 years he dedicated to experimenting with the magnetic field and high frequencies. Starting from 1899 he led a series of experiments, proving that electrical current can be easily passed through the ground. A year later he returned to New York City to build the tower for transatlantic link establishment. The money for the project was donated by one rich banker whose surname was Morgan.

Tesla later confessed that his main aim was to create a machine capable of transmitting electricity to any corner of the planet. The great scientist died in 1943 at the age of eighty-six. The range of his discoveries was incredibly wide. He was the founder of the system of high voltages, the first samples of electromechanical generators, the rotating magnetic field, etc. In 1891 during the public lecture he demonstrated the principles of radio communication.

His discoveries formed the foundation of modern electrical engineering. His projects were willingly financed by many outstanding people of that time, including Vanderbilt, Rothschild, Astor, Morgan and others. And finally, the unit of magnetic induction is named after Tesla. Apart from that, the eccentric scientist was the owner of numerous honorable awards.