The magnetic susceptibility of material of a rod is 599, permeability of vacuum is 4π×10−7 henry/m. The absolute permeability of material of rod in herny/m is__
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a
12π×10−5
b
24π×10−5
c
36π×10−5
d
48π×10−5
answer is B.
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Detailed Solution
Magnetic Susceptibility , χ=μr−1 ⇒χ=μμ0−1 Given : χ=599⇒599=μ4π×10−7−1 ⇒μ4π×10−7=600⇒μ=600×4π×10−5 ⇒μ=24×10-5π μ=24π×10−5henry/m