The free space inside a current carrying toroid is filled with a material of susceptibility 2 × 10⁻². The percentage increase in the value of magnetic field inside the toroid will be (a) 0.1% (b) 1% (c) 2% (d) 0.2%

Answer: (c). B' = μ₀(1+χ)nI, so the fractional increase is χ. Percentage increase = 2 × 10⁻² × 100 = 2% So the answer is (c) 2%.

The free space inside a current carrying toroid is filled with a… | JEE Main 2023 (11 Apr, Shift 1)

Q27JEE Main 2023 · 11 APR · SHIFT 1Easy

Magnetisation: B, H, M, χ & μ

The free space inside a current carrying toroid is filled with a material of susceptibility $2 \times 10^{-2}$ . The percentage increase in the value of magnetic field inside the toroid will be

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Answer: (c)

$B' = \mu_0(1+\chi)nI$ , so the fractional increase is $\chi$ .
Percentage increase $= 2 \times 10^{-2} \times 100 = 2\%$
So the answer is (c) 2%.

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Magnetisation: B, H, M, χ & μ question from JEE Main 2023 (11 Apr, Shift 1)

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