No. There is no evidence to suggest that any galaxy has an abnormally strong electromagnetic field. Black holes are a consequence of gravitational collapse, not electromagnetism. They usually form when a star above a certain mass collapses.
Yes, many galaxies have supermassive black holes at their centers.
Not all galaxies have black holes. While many galaxies, including our own Milky Way, have supermassive black holes at their centers, there are also galaxies that do not have black holes. The presence of a black hole in a galaxy depends on various factors such as the size and age of the galaxy.
Not all galaxies have black holes in their centers, but many large galaxies, including our own Milky Way, are believed to have supermassive black holes at their centers.
It is currently believed that most, if not all, galaxies contain supermassive black holes at their centers. These black holes can vary in size, with some being relatively small and inactive. However, the presence of supermassive black holes in galaxies is a common feature in the universe.
Not all galaxies, but it is believed that the majority of galaxies have central black holes.
Yes they do.
Active Galaxies are thought to be powered by rotation
Not every galaxy has a black hole at its center. While many galaxies do have supermassive black holes at their centers, there are also galaxies that do not have black holes.
It's not "galaxy stars", but galaxies, that have the black holes at their center.All, or most, galaxies have a giant black hole at their center.
Yes
Let's put it this way... All larger galaxies have huge black holes in their center. In addition to that, you can expect any galaxy to have a significant number of stellar black holes.
It's generally believed that galaxies first formed around "ordinary" black holes and over time, they grew into super massive black holes as stars were slowly "consumed" by the black hole.