15
Electric current, magnetic field intensity, length of the conductor, angle between the electric current and magnetic field
the earths shape is sphere.
23.5 degrees
The season
magnetic meridian
The angle between the geographic north and the geomagnetic north is 11.5 degrees..
Since the Earth's magnetic poles are not located at the geographic poles, a magnetic compass doesn't point to 'true' (geographic) north. The DIFFERENCE angle between magnetic north and true north is the magnetic variation or declination where you are. It changes for different locations.
Magnetic declination
The angle varies between 22.1 & 24.5
The angle between the geographic and magnetic poles extends more towards the east, as you move to the north. The magnetic pole is actually near Greenland.
That all depends on WHERE on the earth you are located. The angle between the direction to the north geographic pole and the north magnetic pole is different at different places. Go to "Google.com" and search for "magnetic declination". You'll get plenty to read, and ways to determine what the angle is at your location.
The angle between the geographic and magnetic poles extends more towards the east, as you move to the north. The magnetic pole is actually near Greenland.
The sum of variation and deviation. The angle of magnetic declination, or magnetic variation, is the angle between the local magnetic field lines with which a magnetic compass needle lines up and the direction of true north, the north axis point of Earth. In the U.S., that angle varies between 0 degrees and about 20 degrees and also varies over time.The difference between "true" north and "magnetic" north is called "magnetic variation", which is often abbreviated as "mag var".The north magnetic pole is in northern Canada, but is continually (although slowly) moving. Topographical or navigational maps are generally overprinted with "mag var" lines and the amount of correction.
The sum of variation and deviation. The angle of magnetic declination, or magnetic variation, is the angle between the local magnetic field lines with which a magnetic compass needle lines up and the direction of true north, the north axis point of Earth. In the U.S., that angle varies between 0 degrees and about 20 degrees and also varies over time.The difference between "true" north and "magnetic" north is called "magnetic variation", which is often abbreviated as "mag var".The north magnetic pole is in northern Canada, but is continually (although slowly) moving. Topographical or navigational maps are generally overprinted with "mag var" lines and the amount of correction.
The sum of variation and deviation. The angle of magnetic declination, or magnetic variation, is the angle between the local magnetic field lines with which a magnetic compass needle lines up and the direction of true north, the north axis point of Earth. In the U.S., that angle varies between 0 degrees and about 20 degrees and also varies over time.The difference between "true" north and "magnetic" north is called "magnetic variation", which is often abbreviated as "mag var".The north magnetic pole is in northern Canada, but is continually (although slowly) moving. Topographical or navigational maps are generally overprinted with "mag var" lines and the amount of correction.
It's called the Dip.
The angle between the direction your compass points and the direction you're facing is the 'magnetic azimuth'. The angle between the direction to the north pole and the direction you're facing is the 'true azimuth'. They are virtually never the same angle. The difference between them is the 'magnetic declination' or the 'compass declination' in the place where you are at in which.