Drakkith said:I've never heard of the electromagnetic force overcoming the gravitational pull of a black hole. Are you sure about that?
If you just added more electrons to it, it would just stay an extremal black-hole with a larger charge and mass... if you magically added only charge, and not mass---well, GR says you can't do that.kcajrenreb said:If you were to greatly increase the elctrical charge of an extremal Black Hole, (ie, drop a lot of electron in) what exactly would happen to it? I know the electrical repulsion would become more powerful than the gravity, so would it tear itself apart?
Its not quite as simple as EM 'overcoming' gravity, nothing can 'overcome' the gravity. But you can get very exotic spacetime geometries... perhaps even naked singularities according to some loop quantum gravity, and pure GR extrapolations...Drakkith said:I've never heard of the electromagnetic force overcoming the gravitational pull of a black hole. Are you sure about that?
zhermes said:If you just added more electrons to it, it would just stay an extremal black-hole with a larger charge and mass... if you magically added only charge, and not mass---well, GR says you can't do that.
twofish-quant said:Specifically imagine that you add a lot of electrons to the black hole. The electrons all have negative charges so they are repelling each other. However, those negative charges have stored potential energy and that energy has an equivalent mass (E=mc^2).
So if you try to add enough charge to blow the black hole apart, what happens is that that charge has potential energy which has mass which has gravity which keeps the black hole together.
An extremal black hole is a type of black hole with the maximum possible charge that it can hold. This means that any additional charge added to the black hole would cause it to become unstable and eventually evaporate.
The charge of a black hole can be increased by adding charged particles to it. These particles can come from the surrounding environment or can be purposely injected into the black hole using advanced technology.
When the charge of a black hole is increased, its properties change. It becomes more distorted and its event horizon (the point of no return) increases in size. Additionally, the black hole's ability to attract and absorb matter also increases.
Yes, increasing the charge of a black hole can have negative effects. As mentioned before, if the charge reaches its maximum limit, the black hole will become unstable and eventually evaporate. This can also have consequences for the surrounding environment, as the evaporation of a black hole releases a massive amount of energy.
Increasing the charge of a black hole can affect its gravitational pull in two ways. First, the increased charge can cause the black hole to spin faster, which in turn creates a stronger gravitational pull. Second, the increased charge also causes the black hole's event horizon to expand, which can lead to a larger area of influence for the black hole's gravitational pull.