Two parallel wires carrying equal currents in opposite directions are placed at 
parallel to 
‐axis with 
. Magnetic field at origin 
is 
and at 
is 
. Then the ratio 
is
A
B
C
D
2
Text Solution
Verified by ExpertsThe correct answer is:
A
Case 
: If the currents are in the directions shown in figure. Then
magnetic field at 
magnetic field at 
Case II: In this case
and 
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