A long wire carries a steady current. It is bent into a cirde of one turn and the magnetic field at the centre of the coil is B . It is then bent into a circular loop of n turns. The magnetic field at

Question

A long wire carries a steady current. It is bent into a cirde of one turn and the magnetic field at the centre of the coil is B . It is then bent into a circular loop of n turns. The magnetic field at the centre of the coil for same current will be

TestHub · Accepted Answer

Magnetic field at the centre of single turn loop B = 4 π μ 0 ​ ​ r 2 π I ​ , magnetic field at the centre of n turn loop ⇒ B n ​ ​ B n ​ = [ 4 π μ 0 ​ ​ r / n 2 π I ​ ] × n = n 2 B ​

Physics - Magnetism Question with Solution | TestHub

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