I know that a tram runs on electricity. And that to drive a motor you need a positive and a negative pole. But a tram usually only has one catenary (I only see one in Ghent). How can the tram receive both poles?
Asker: Otto, 11 years old

Answer
Dear Otto
The catenary that you see shows the positive voltage. A tram has metal (conductive) wheels and these are in contact with the tracks, the tracks serve as a negative pole.
Kind regards
Answered by
Ing Bart Smeets
Electronics ICT Electricity
UCLL
UC Leuven Andreas Vesaliusstraat 13 | 3000 Leuven Hertogstraat 178 | 3001 Heverlee UC Limburg Campus Diepenbeek, Agoralaan Building B bus 1 3590 Diepenbeek
http://www.ucll.be
UC Leuven Andreas Vesaliusstraat 13 | 3000 Leuven Hertogstraat 178 | 3001 Heverlee UC Limburg Campus Diepenbeek, Agoralaan Building B bus 1 3590 Diepenbeek
http://www.ucll.be
.