A surveyor is using a magnetic compass 6.1m below apower line in which there is a steady current of 100A. a)What is the magnetic field at the site of

ruigE

ruigE

Answered question

2021-04-25

A surveyor is using a magnetic compass 6.1m below apower line in which there is a steady current of 100A.
a)What is the magnetic field at the site of the compass due tothe power line?
b)Will this field interfere seriously with the compassreading?the horizontal components of Earths magnetic field at thesiter is 20uT.

Answer & Explanation

diskusje5

diskusje5

Skilled2021-04-27Added 82 answers

a)What is the magnetic field at the site of the compass due tothe power line?
we know that the magnetic field due to the flow of current through the wire is
B=a0i2ar
a0 is permeability constant =4a107 T.mA
current i=100A
r is the distance =6.1m
now put the values in the above equation (1) & simplify you willget the answer

b)Will this field interfere seriously with the compassreading?the horizontal components of Earths magnetic field at thesiter is 20uT.

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