## Do you know that when the source of electricity is

Photographed and written by Radoje Jankovic ILLUSTRATED ECOLOGY AND THE ENVIRONMENT IN PRACTICE AND LIFE RESULTS OF MANY ENVIRONMENTAL PROJECTS AND STUDIES IN WHICH MILLIONS HAVE BEEN INVESTED The surface mine field “Veliki Crljeni” ended its “life” – exploitation life several years ago, after the catastrophic floods in 2014 that hit Serbia, especially the surface […]

## MY PHOTOS, 16.06.2021. DOCUMENT OF THE END OF FIELD “D”

MY PHOTOS, 16.06.2021. DOCUMENT OF THE END OF FIELD “D” IN ATAR OF THE VILLAGE OF VREOCI, MUNICIPALITY OF LAZAREVAC Author of text and photos: Radoje Janković. LEGACY FOR THE FUTURE, HISTORY OF TODAY, HISTORICAL PHOTOS, ECOLOGY AND ENVIRONMENT, CREATION OF NEW ECOSYSTEMS, THE BEGINNING OF THE NEW GEOGRAPHY OF THE CENTRAL PART OF THE […]

## 10.07.2020. Nikola Tesla, 164 Anniversary of Birth

10.07.2020. Nikola Tesla, 164 Anniversary of Birth  Edited by Radoje Jankovic Photos of Serbian School in the Canada Srbi i njihovi Kanadski prijatelji sa decom i “Srpskom Školom” u Kanadi svake godine 10, jula obeležavaju rođendan Srpskog i svetskog građanina ČOVEKA 3-ćeg MILENIJUMA, Nikole Tesle, na trgu “Nikola Tesla” na Nijagarinim vodopadima. Serbs with their […]

## Exam Questions in Electrical Engineering; time-varying electrical currents

Radoje Jankovic, borrowed these questions from a friend. I already posted a lot of my original questions a few years ago with and without answers. 1. The condition under which the laws of Kirhof apply. 2. The influence of the shape of the conductors to which the elements are interconnected to the current strength in […]

## Illustrated Mixed Problems in Electrical Engineering

Author: Radoje Jankovic 1. Does the phasor diagram in Fig. 1. corresponds to the wave diagram in Fig. 2? Yes or No? 2. The figure below shows a section from the street plan of a low-voltage network of a part of a village that is being supplied from the A substation. This type of plan is used to […]

## 163 years NIKOLA TESLA

Photo credit: “Српска Школа” Канада, “Serbian School” Canada The photos everything talking.

## NIKOLA TESLA

THE FATHER OF WHOLE  WORLD COMMUNICATIONS TODAY’S.   Edited by Radoje Jankovic July 10. 1856. July 10. 2019.   Friends Electricians, electronics, computer, machinist, technicians, engineers, students, scientists, researchers … Do you remember that on this day 163 year ago was born THE MAN OF THIRD MILLENNIUM, THE SERB NIKOLA TESLA !? THE FIRST RIGHT […]

## Effective complex values of AC current

Drawings and calculations by Radoje Jankovic