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Standard XII

Physics

Magnetic Moment

The magnetic ...

Question

The magnetic flux through toroid changes from $0.65 m W b t o 0.91 m W b$ when the air-core is replaced by some other material. What is the value of the relative permeability of the material?

0.71

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1.20

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1.40

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1.50

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Solution

The correct option is C $1.40$
The are core is essentially the same
as vacuum core
since $k m = B / B_{v}$ and $ϕ = B_{1} A$
$K m = \frac{ϕ}{ϕ_{v}} = \frac{0.91 m W b}{0.65 m W b} = 1.40$
Then is the relative permeability

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The magnetic flux through toroid changes from 0.65mWbto0.91mWb when the air-core is replaced by some other material. What is the value of the relative permeability of the material?

The correct option is C 1.40The are core is essentially the same as vacuum core since km=B/Bv and ϕ=B1AKm=ϕϕv=0.91mWb0.65mWb=1.40Then is the relative permeability

The magnetic flux through toroid changes from $0.65 m W b t o 0.91 m W b$ when the air-core is replaced by some other material. What is the value of the relative permeability of the material?

The correct option is C $1.40$
The are core is essentially the same
as vacuum core
since $k m = B / B_{v}$ and $ϕ = B_{1} A$
$K m = \frac{ϕ}{ϕ_{v}} = \frac{0.91 m W b}{0.65 m W b} = 1.40$
Then is the relative permeability