1. Belarusian State University, Independence av. 4, 220030 Minsk, Belarus
2. Institute of Physics of Azerbaijan National Academy of Science, Baku, Azerbaijan
3. Department of Electrical Devices and High Voltages Technologies, Lublin University of Technology Nadbystrzycka 38a, 20-618 Lublin, Poland
4. Al-Balqa Applied University, P.O. Box 4545, Amman 11953, Jordan