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A magnetizing field of 1600 Am^-1 produces a magnetic flux of 2.4× 10^-5weber in a bar of iron of cross - section
0.2× 10^–4m². Calculate permeability and susceptibility of the bar

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75 × 10^-5 TA^-1m, 596.1

1.5 × 10^-4 TA^-1m, 396.1

1.5 × 10^–4 TA^–1m, 596.1

7.5 × 10^–5 TA^–1m, 496.1

answer is B.

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Detailed Solution

$\begin{array}{l} B = \frac{ϕ}{A} = 1 .2 wb / m^{2} \Rightarrow μ = \frac{B}{H} = 75 \times 10^{- 5} \\ μ = μ_{0} (1 + χ) ∴ χ = \frac{μ}{μ_{0}} - 1 = 596 .1 \end{array}$

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