46 A wire is wound on a long rod of material of relative permeability p 4000 to make a solenoid If the current through the wire

Question

46 A wire is wound on a long rod of material of relative permeability p 4000 to make a solenoid If the current through the wire is 5A and number of turns per unit length is 1000 per metre then the magnetic field inside the solenoid is an tesla Find the value of a

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