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Q: Why is LED on compass needle used in tester sometime?
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Related questions

Direction tool used in real life compass?

compass needle?


What is the compass needle used for?

To point to magnetic north.


Can a electric current be used to deflect a compass needle?

Yes,


Can an electric current be used to deflect a compass needle?

Yes.


An electric current cannot be used to deflect a compass needle?

Yes, it can.


What is the purpose of the Lensatic Compass?

A lensatic compass is a compass with a magnifying glass on the sight which makes it easier to view the needle. These types of compasses are frequently used in the military.


What can be used for a compass?

a freely suspended magnetic needle as it will always point to the north - south direction


What is the difference between an Australian compass and British compass?

The needle of a compass must be free to rotate so that it can point to magnetic north. The magnetic field of the earth not only rotates the compass needle horizontally but also pulls one end down. If it pulls the needle down it can stop it from turning freely so on many compasses the needle is balanced for use in a specific zone. There are 5 zones. Austraila and Britain are in different zones. This means the needle may not be level if used in the other's zone. Needles are balanced by making one end of the needle longer or by adding weight to one end of the needle.


Why does the compass point north in the southern hemisphere?

The direction of magnetic flux or lines of force is from north polarity to south polarity, and a compass needle will always align with that direction, wherever it is used. Since the magnetic polarity of the location we call Magnetic North is a south, a compass needle will point in that direction.


What does a magnetic compass do?

It uses a magnetic needle to point to the earth's magnetic North Pole. The only other type of compass used is a gyro-compass. This uses a wheel which rotates parallel with the earth's rotation.


How did Oersted discover the relationship between an electricity and magnetism?

He used an electric current to affect the needle of a compass.


What is the material to make a compass needle gold silver iron or copper?

Are you asking what material is a compass needle made from? It that is your question, you need to keep in mind that the material used must have magnetic properties. Research the Iron Triad from the Periodic Table.