A Rowland ring of mean radius $15 c m$ has $3500$ turns of wire wound on a ferromagnetic core of relative permeability $800$ . What is the magnetic field $B$ in the core for a magnetising current of $1.2 A$ ?

4.48

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Solution

The correct option is A 4.48

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A Rowland ring of mean radius 15 cm has 3500 turns of wire wound on a ferromagnetic core of relative permeability 800. What is the magnetic field B in the core for a magnetising current of 1.2 A?

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A Rowland ring of mean radius 15cm has 3500 turns of wire wound on a ferromagnetic core of relative permeability 800. What is the magnetic field B in the core for a magnetising current of 1.2A ?

The correct option is A 4.48

A Rowland ring of mean radius $15 c m$ has $3500$ turns of wire wound on a ferromagnetic core of relative permeability $800$ . What is the magnetic field $B$ in the core for a magnetising current of $1.2 A$ ?