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Do black holes have a maximum electric charge?

Daniel and Kelly’s Extraordinary Universe

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The Event Horizon and the Ergosphere

In Einstein in gravity, it matters whether something is spinning or not. You have a different gravitational effect. So if your black hole is spinning, it doesn't have a singularity in the middle, like a point. And then there's this donut shaped ergo sphere around it. If you're in the ergo sphere, you're going to get a little bit of a twist as well as a pull. This frame-jacking effect can actually also create a spin. Remember that we've measured this frame-jacked effect using gravity pro B,. A satellite that orbits the earth with super hyper precise gyroscopes that measure these kinds of spins.

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