Question
Question: In the figure shown the magnetic field at the point P is 
D
3πa2μ0i(4−π2)
Answer
Explanation
Solution
Where (B1)p=4π(23a)μoi(−j^) (semi-infinite wire)
(B2)p=4(23a)μoi(+k^) ,
, (B5)p=4π(2a)μoi(−j^)
.
Hence (2) is correct