Which pole of a magnet orients itself toward the Earths geog

Which pole of a magnet orients itself toward the Earth\'s geographic North pole?

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Question 21 pts

If there was a huge permanent magnet creating the Earth\'s magnetic field, how would that magnet be oriented?

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Question 31 pts

What happens when you cut a permanent magnet in half?

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Question 41 pts

How can we figure out the direction of the magnetic field caused by a current element?

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Question 51 pts

Solution

Which pole of a magnet orients itself toward the Earth\'s geographic North pole?

North

the Geometric north pole is the the magnetic south pole of the Earth , we know that the opposite poles attracts each other.

so North ole of a magnet orients itself toward the Earth\'s geographic North pole

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South at the Earth\'s geographic North pole, North at the Earth\'s geographic South pole.

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What happens when you cut a permanent magnet in half?

Each half will turn into its own dipolar magnet , because magnetic monopoles does not exist , otherwise the magnetic flux for a closed surface is not zero (Gauss law in magnetism).

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we can figure out the direction of the magnetic field caused by a current element by

Right hand rule

if you hold the current carrying wire in your right hand so that the thumb indicates the current direction then the curling fingers gives the magnetic field direction

the direction of the magnetic field either into the page or out of the page depends on the direction of the current .

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He is expressing the magnitude of a cross product