Magnetic field due to currentHard
Question
An infinitely long straight conductor is bent into the shape as shown in figure. It carries a current I ampere and the radius of the circular loop is r meter. Then the magnetic induction at the centre of the circular part is : -
Options
A.Zero
B.∞
C.
(π + 1)
(π + 1)D.(π - 1)
(π - 1)
= 
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