Earth's magnetic field is how many T(tesla) strong ? How many tesla can deflect a magnetic compass ? Nacl generates how many T as an electrolyte ?

Dear student, 

We request you to ask a single question in a particular query.Here we are answering two of your queries.

The strength of  earth's magnetic field is in the range of 25000-65000 nanoTesla(nT).

The 
earth's magnetic pole near geographical north is actually the south magnetic pole. Similarly the magnetic pole near earth's geographical south is the north magnetic pole.  ​The  magnetic field required to deflect a magnetic compass will be similar to that of the earth's magnetc field. 

Regards.

 

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