The magnetic induction at a point 
which is at the distance of 4 cm from a long current carrying wire is 
T. The field of induction at a distance 12 cm from the current will be
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
. By Ampere’s law.
As the distance is increased to three times, the magnetic induction reduces to one third.
Hence 
tesla 
tesla
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