The percentage increase in magnetic field (B) when space within a current carrying solenoid is filled with magnesium (magnetic susceptibility χ mg = 1.2 × 1 0 − 5 ) is :

Question

The percentage increase in magnetic field (B) when space within a current carrying solenoid is filled with magnesium (magnetic susceptibility χ mg ​ = 1.2 × 1 0 − 5 ) is :

TestHub · Accepted Answer

​ % change in B = B old ​ B new ​ − B old ​ ​ × 100% = μ 0 ​ ni μ ni − μ 0 ​ ni ​ × 100% = μ 0 ​ ( μ − μ 0 ​ ) ​ × 100% = μ 0 ​ ( μ 0 ​ μ r ​ − μ 0 ​ ) ​ × 100% = ( μ r ​ − 1 ) × 100% = χ n ​ × 100% = 1.2 × 1 0 − 3 % ​

Physics - Magnetism Question with Solution | TestHub

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