A straight conductor of length l m carrying a current I A is bent in the form of a semicirle. The magnetic field (in tesla) at the centre of the semicircle is Solution in Bengali
A. π²I/l×10⁻⁷
B. πI/l×10⁻⁷
C. πI/l²×10⁻⁷
D. πI²/l×10⁻⁷