North-South Plane: Questions Answered

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The discussion clarifies the distinction between the north-south plane and the north-south axis, emphasizing that a plane is not the same as an axis. The term "75 degrees below the north-south plane" refers to the angle of dip of the Earth's magnetic field, which is measured at a specific location. Participants seek guidance on calculating the magnetic force on a wire carrying a current in different orientations relative to this magnetic field. The magnetic field strength is noted as 0.60 × 10−4 T, and the wire's current is specified as 15 A. Understanding the diagram and the angle of dip is crucial for answering the posed questions accurately.
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can i Ask what do they mean by 75 degree below the north -south plane?
North-southplane and north-south axis is the same thing?
 
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They shouldn't- a "plane" is not an "axis"- but that is clearly what is meant. South to North is a single direction, a single line, and a single line does not define a plane. They have to mean the "North-South" axis.
 
At a certain location, Earth has a magnetic field of 0.60 × 10−4 T, pointing 75° below the horizontal in a north–south plane. A 10.0-m-long straight wire carries a 15-A current. (a) If the current is directed horizontally toward the east, what are the magnitude and direction of the magnetic force on the wire? (b) What are the magnitude and direction of the force if the current is directed vertically upward?
so how do i answer this ques? I dun get imagine the diagram..with the north-south axis
 
reyunknown said:
At a certain location, Earth has a magnetic field of 0.60 × 10−4 T, pointing 75° below the horizontal in a north–south plane. A 10.0-m-long straight wire carries a 15-A current. (a) If the current is directed horizontally toward the east, what are the magnitude and direction of the magnetic force on the wire? (b) What are the magnitude and direction of the force if the current is directed vertically upward?
so how do i answer this ques? I dun get imagine the diagram..with the north-south axis

75° is the angle of dip
 
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