I want to know about the black magic and if some magicians do tricks before a crowd, are these tricks considered black magic? Are these tricks are permissible in Islam.
no its absolutely haram In Quran, Allah Almighty says:
“Suleman (Solomon) did not disbelieve, but the devils disbelieved teaching men magic.” (2:102)
From this ayah of Quran, it is clear that magic is one of the teachings of Satan. Those who disbelieve follow the path of Satan and these are the ones who rely on magic as a means to fulfilling their desires and make their wishes come true.