In general, when a star runs out of nuclear fuel, gravity gets the upper hand and the material in the core is compressed even further and creates black holes. I am clear till here.
Now the question is, Is it depends on the mass of the star (or Object)?
Naturally, the more massive the core of the star, the greater the force of gravity that compresses the material and easy to create Black Hole.
For smaller stars, when the nuclear fuel is exhausted and there are no more nuclear reactions to fight gravity, the repulsive forces among electrons within the star eventually create enough pressure to halt further gravitational collapse. The star then cools and dies PEACEFULLY.
If you accept till here, my question is, in the science videos and discussions, they say that, we can create Black hole from any object, i mean for example, if we are able to compress EARTH to the size of the Tennis Ball, then we can create Black Hole, Is it True?
Doesn't the Nuclear Fusion / Reaction is necessary to create Black Hole. Of course to fight against gravity we may require some kind of energy in this case, Nuclear reactions. But i am generally concerned like, does Nuclear Reaction is only to fight gravity, it does not play any other role in creating Black Hole.