Discovering Earth's Direction with Magnetic Needle Compass

  • Context: High School 
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Discussion Overview

The discussion revolves around understanding how to determine directions using a magnetic needle compass and the application of the Stewart tangent galvanometer experiment. Participants explore the principles behind compass functionality and inquire about the specifics and applications of the galvanometer experiment.

Discussion Character

  • Exploratory
  • Technical explanation
  • Homework-related

Main Points Raised

  • One participant asks how to determine north and south using a magnetic needle compass, referencing a picture that seems to confuse the relationship between the compass points.
  • Another participant clarifies that the compass needle points north, despite the confusion about the magnetic poles.
  • Several participants inquire about the Stewart tangent galvanometer experiment, specifically its applications and how to conduct it.
  • One participant questions the deflection range mentioned in a video related to the galvanometer, expressing confusion about the expected angles of deflection.

Areas of Agreement / Disagreement

Participants express confusion and seek clarification on various aspects of compass usage and the galvanometer experiment. There is no consensus on the specifics of the galvanometer's deflection or its applications, as questions remain unresolved.

Contextual Notes

Participants reference a video for explanations, but there are indications of missing assumptions regarding the compass and galvanometer principles. The discussion reflects varying levels of understanding and interpretation of the material presented.

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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