ELECTRIC ENERGY


Discovery of dynamite, electric motor, transformer and transfer of electric energy under high tension without bigger losses on larger distances (Nikola Tesla) led to progress of production of electricity. Coal and water were used in thermo and hydroelectric power stations which produced cheap electricity especially after invention of bulb. All mentioned discoveries led to the period of electricity and it's use in industry. After increased use of electric power followed numerous inventions like microphone, receiver (radio), wireless telegraph, tramway (street railway), film camera, projector,...