Question

Current flowing in conductors A and B is
same, what is the ratio of the magnetic
field produced around the conductor A at a
distance of 5 cm from the conductor to the
magnetic field produced around the
conductor B at a distance of 2 cm from this
conductor is
a.0.04
b.0.4
c. 4.0
d.10​

Answer 1

Answer:

magnetic field is inversely proportional to the distance from the conductor.

so Ba/Bb=0.4

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Explanation:

Answer 2

Answer:

B= u°I/2pie.d

so,

B1 (of conductor A)= u°I/2pie.5

and

B2 (of conducter B)=u°I/2pie.2. ( I is same in both )

so,

B1/B2 = (u°I/2pie.5)/(u°I/2pie.2)

=2/5

=0.4 ans.