Question

Magnetic field of a short magnet at a distance 1m on axial line is 1 oersted at a distance 2 m on the same line the intensity in oersted is:

Answer 1

Answer:

1/8 oersted

Explanation:

Formula Used :

Magnetic field of the axial line,

$B=\frac{2kM}{x^{3} }$

Solution:

Case 1: when x=1m

$B=\frac{2kM}{1}$                        

1=2kM                                         ...1

Case 2: when x=2m

$B=\frac{2kM}{8}$                                     ...2

Dividing equations 1 and 2

$\frac{B}{1}=\frac{\frac{2kM}{8} }{2kM} \\B=\frac{1}{8} oersted$

Answer 2

Explanation:

2m ampere = 0.125 oersted

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