Timeline for Electrical Generator
Current License: CC BY-SA 3.0
2 events
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| Nov 19, 2014 at 9:14 | comment | added | Selene Routley | You're simply calculating $\frac{1}{2\,\mu_0}\,|\vec{B}|^2$ and multiplying by a suitable volume to get your $10^{19}{\rm J}$, right? I'm not sure that this works though: wouldn't the liquid core flow keep replenishing the field, in which case you would be sapping the Earth's rotational kinetic energy (which would keep us powered for a great deal of time)? Might be a good idea to add to your last line the fact that our magnetic field shields our atmosphere from the Solar wind, and thus is essential to keeping the Earth livable. | |
| Nov 19, 2014 at 8:22 | history | answered | user56903 | CC BY-SA 3.0 |