Discovering Earth's Direction with Magnetic Needle Compass

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To determine direction using a magnetic needle compass, the needle's north point indicates true north, despite the confusion around the magnetic poles. The discussion clarifies that the south end of the compass needle is magnetized to point north, which is standard for compass design. Questions arise about the Stewart tangent galvanometer experiment, particularly its purpose in measuring magnetic fields. The video linked provides explanations of both the principles and applications of the experiment, although further clarification is requested regarding specific deflection angles observed. Overall, the conversation emphasizes understanding compass functionality and the experimental applications of magnetic field measurement.
ENE
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Hello,
How to perform and know north south from magnetic needle compass??
as in this picture it show North + south = south + north
so, how to find Earth direction??
 

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Welcome to PF.

The picture you attached says "compass points north". That is the answer.

Are you confused that the point of the needle is the magnets S pole? Ignore that. N attracts S, so we make the S end of the compass needle look like an arrow that points N.
 
ok, thanks.
How to do experiment Stewarttangent galvanometer?
 
ENE said:
ok, thanks.
How to do experiment Stewarttangent galvanometer?
That video you posted explains pretty well, so please be more specific with your question.
 
I mean what is the application of this experiment ?
is to find magnetic field by coil it self??
 
ENE said:
I mean what is the application of this experiment ?
is to find magnetic field by coil it self??

That is clearly explained in the video. It demonstrates the "principle" explained in the video and the "applications" explained in the video.
 
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Hello,
At 4:12 time it say the deflection is between 30 and 60 how?
at rest it was 0 degree initial.
so, deflection should be in 0-30 or 0-60??
 
Last edited:

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