The region inside a current carrying toroid is filled with a material (Niobium) having susceptibility χ = 2.6 × 10⁻⁵. The percentage increase in the magnetic field in the presence of Niobium over that without it, is (a) 2.6 × 10⁻⁵ (b) 2.6 × 10⁻⁴ (c) 2.6 × 10⁻³ (d) 2.6 × 10²

Answer: (c). With the material B' = (1+χ)B, so percentage increase = χ × 100. = 2.6 × 10⁻⁵ × 100 = 2.6 × 10⁻³% So the answer is (c).

The region inside a current carrying toroid is filled with a material… | MHT CET 2026 (18 Apr, Shift 1)

Q11MHT CET 2026 · 18 APR · SHIFT 1Medium

Magnetisation: B, H, M, χ & μ

The region inside a current carrying toroid is filled with a material (Niobium) having susceptibility $\chi = 2.6 \times 10^{-5}$ . The percentage increase in the magnetic field in the presence of Niobium over that without it, is

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Answer: (c)

With the material $B' = (1+\chi)B$ , so percentage increase $= \chi \times 100$ .
$= 2.6 \times 10^{-5} \times 100 = 2.6 \times 10^{-3}\%$
So the answer is (c).

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Magnetisation: B, H, M, χ & μ question from MHT CET 2026 (18 Apr, Shift 1)

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