Discovering Earth's Direction with Magnetic Needle Compass

In summary, the conversation discusses how to determine north and south using a magnetic needle compass and the application of the Stewart tangent galvanometer experiment. The video that was mentioned provides a clear explanation of the principles and applications of the experiment. Additionally, the conversation touches on the range of deflection for the experiment and how it relates to the initial position of 0 degrees.
  • #1

ENE

42
2
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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  • #2
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.
 
  • #3
ok, thanks.
How to do experiment Stewarttangent galvanometer?
 
  • #4
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.
 
  • #5
I mean what is the application of this experiment ?
is to find magnetic field by coil it self??
 
  • #6
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.
 
  • Like
Likes davenn
  • #7
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:

What is a magnetic needle compass?

A magnetic needle compass is a navigational instrument that uses the Earth's magnetic field to determine direction. It consists of a magnetized needle that aligns with the Earth's magnetic field, allowing it to point towards the Earth's magnetic North pole.

How does a magnetic needle compass work?

A magnetic needle compass works by utilizing the Earth's magnetic field. The needle is suspended on a pivot point and is able to rotate freely. The Earth's magnetic field causes the needle to align with it, allowing it to point towards the Earth's magnetic North pole and thus indicate direction.

What are the benefits of using a magnetic needle compass?

A magnetic needle compass is a reliable and easy-to-use tool for determining direction. It does not rely on any external power source and can be used in all weather conditions, making it a valuable tool for outdoor activities or navigation.

How accurate is a magnetic needle compass?

A magnetic needle compass is generally accurate within a few degrees, but its accuracy can be affected by external factors such as nearby metallic objects, strong magnetic fields, or incorrect handling. It is important to regularly calibrate the compass to ensure accuracy.

Can a magnetic needle compass be used anywhere on Earth?

Yes, a magnetic needle compass can be used anywhere on Earth, as long as it is properly calibrated. However, the closer you are to the Earth's poles, the less reliable the compass may be due to the convergence of the Earth's magnetic field lines.

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