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Sep 9, 2017 at 7:59 history edited Wrzlprmft CC BY-SA 3.0
Using proper block quote. Some minor stuff.
May 5, 2014 at 5:22 vote accept user 0
May 4, 2014 at 19:54 answer added Floris timeline score: 1
May 4, 2014 at 19:26 history edited user 0 CC BY-SA 3.0
added 35 characters in body
May 4, 2014 at 19:21 comment added user 0 The wire is oriented east to west. We never really explained the direction of the field lines in class except for the fact that they go North to South, so from the Northern Hemisphere towards the Southern when you're on the earth. My teachers explanation implied that the magnetic field points into the Earth, since he said the answer was east.
May 4, 2014 at 19:14 comment added John Rennie Hmm, I see your point. Assuming the wire is oriented east-west then if it's moving from north to south it isn't crossing any field lines. Having said this, the field is only parallel to the Earth's surface at the equator. In the northern hemisphere the field lines point slightly upwards out of the Earth and in the southern hemisphere the field lines point slightly downwards into the Earth (or is it the other way round - I can never remember which way magnetic field lines point).
May 4, 2014 at 19:04 history asked user 0 CC BY-SA 3.0