Select True or False for each of the following statements regarding magnetism, a
ID: 1263571 • Letter: S
Question
Select True or False for each of the following statements regarding magnetism, and the earth's magnetic field "B."
True or False
The earth's B lines are parallel to the earth's surface at all points.
B does work on a charge only when the charge has a velocity component perpendicular to B.
For a bar magnet, the B - lines exit through the N pole and return through the S pole .
Like magnetic poles attract.
B does work on a charge only when the charge has a velocity component parallel to B.
The vector B acts only on charges at rest.
The magnitude of earth's B is about 1E-4 Tesla.
Explanation / Answer
False : The magnetic field needs to enter and exit the earth somewhere.
False :As long as SOME amount of the velocity is in the same direction as the B field, work is done. It doesn