3 ms·
It doesn't take any energy to maintain a static magnetic field though.
by mr_mitm 2y ago
It doesn't take any energy to maintain a static magnetic field though.
- deleted 2y ago[deleted]
- jagger27 2y agoEarth's magnetic field isn't static, though.
- mr_mitm 2y agoNegligibly so. The Sun delivers more energy to Earth in about 5 seconds than the magnetic field loses in 1,000 years.
- timewizard 2y agoThe magnetic field is coherent. The energy from the Sun is not.
- pfdietz 2y agoThe currents that produce the magnetic field are flowing in liquid metal with nonzero resistivity.