query: Variations of earth's magnetic field strength among different geographical locations
positive_passages.docid: 156570
positive_passages.text: Variations of earth's magnetic field strength
negative_passages.docid: 24488
negative_passages.text: What's the difference between magnetic fields $H$ and $B$?
negative_passages.docid: 150081
negative_passages.text: Deriving Lagrangian density for electromagnetic field
negative_passages.docid: 57084
negative_passages.text: Characteristic of the following field?
negative_passages.docid: 115158
negative_passages.text: Can magnetic fields be redirected and focused at one point?
negative_passages.docid: 137177
negative_passages.text: Do magnets work in outer space?
negative_passages.docid: 104703
negative_passages.text: Why do electromagnetic waves become weaker with distance?
negative_passages.docid: 101023
negative_passages.text: Does special relativity make magnetic fields irrelevant?
negative_passages.docid: 90503
negative_passages.text: Period of oscillation through a hole in the earth
negative_passages.docid: 56044
negative_passages.text: Does Earth's Rotation Affect Its Shape?
negative_passages.docid: 80184
negative_passages.text: Appropriate map projection for the Pacific Ocean
negative_passages.docid: 56198
negative_passages.text: Magnetic Field in the presence of a conductor
negative_passages.docid: 109916
negative_passages.text: Magnetic field at the centre of a loop
negative_passages.docid: 106563
negative_passages.text: How to interpret the magnetic vector potential?
negative_passages.docid: 109590
negative_passages.text: Work done by the Magnetic Force
negative_passages.docid: 107605
negative_passages.text: Determining the characteristic of a field
negative_passages.docid: 63973
negative_passages.text: What are the characteristics of the magnetic field surrounding a human brain?