What is the magnetic field strength of the earth? How does this compare to the magnetic field strength of a bar magnet? b) How does the strength of an electromagnet compare to the strength of the bar magnet? c) Give 2 advantages of electromagnets over a bar magnets?

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a) What is the magnetic field strength of the earth? How does this compare to the
magnetic field strength of a bar magnet?

b) How does the strength of an electromagnet compare to the strength of the bar magnet?

c) Give 2 advantages of electromagnets over a bar magnets? 

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Step 1

The magnetic field strength of the Earth varies with the position on the Earth, its value at the north pole is 60 micro Tesla (0.6 Gauss) and at the equator is 30 micro Tesla (0.3 Gauss), we can take the average magnetic field strength of the Earth to be 4 micro Tesla or 0.4 Gauss.

 

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