alleryThe Earth's magnetic field is roughly comparable to that of:
AA current-carrying solenoid
BA giant bar magnet tilted by ~11° from rotation axis
CA point monopole at the core
DTwo parallel sheets of current
Answer & Solution
Correct answer: B. A giant bar magnet tilted by ~11° from rotation axis
1. To first approximation, the Earth behaves like a bar magnet whose magnetic axis is tilted ~11° from the rotation axis.
2. Magnetic North (the pole a compass points to) is actually the SOUTH of this dipole.
3. Generated by currents in the molten outer core (geodynamo).
_Source: syllabus Science Ch 12 §12.1 Earth's Magnetic Field_
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