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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > The core of a toroid having 3000 turns has inner and outer radii of 11 cm and 12 cm respectively. THe magnetic field in the core for a current of 0.70 A is 2.5 T. What is the relative permeability of the core?

The core of a toroid having 3000 turns has inner and outer radii of 11 cm and 12 cm respectively. THe magnetic field in the core for a current of 0.70 A is 2.5 T. What is the relative permeability of the core?

joining the two poles the magnetic field will be Zero ? Two like magnetic poles of strength 25 Am and 64 Am are situated 1 m apart in air. At what point on the line