[alexander_busek]

What I was alluding to in that thought experiment was that the electrical repulsive force in the positively charged black hole could be significant compared to the gravitational force. I would think that would enlarge the event horizon, at least for some outside positively charged particle that happened to stray nearby. Electrons would neutralize that black hole, but increase its mass relatively modestly, making me think that would tend to shrink the event horizon.

Summary: You are wondering whether the Black Hole's electrical charge (apart from the mass of those charged particles) might somehow contribute to the area of its Event Horizon, right?

Don't think so.

But in my thought experiment, a spaceship is given a significant electrical charge, and then carefully guided towards a Black Hole with a like charge until it is effectively "floating" almost motionlessly just over the Event Horizon. The spaceship could then rid itself (in a controlled fashion) of some of its electrical charge, and thus sink slowly towards the Event Horizon, and perhaps partially immerse into it. The spaceship could then dispose of some of the opposite charge (by jettisoning opposite-charged particles), thus increasing the repulsive force. QUESTION: Could this be used to essentially "re-emerge" from the Event Horizon? The beauty of this hypothetical method is that it wouldn't require incredible expenditures of energy (rocket fuel) and/or high speeds in order to "play around" in the immediate vicinity of the Event Horizon.

Regards,

[rightwingcrazy]

You might enjoy the article that I just referenced above.

I like your thought experiment. You’ll have to work out some way for the spaceship not to be torn apart by tidal forces. Maybe if the black hole were particularly huge, or if the craft were particularly devious in its design.