CUET · PHYSICS · PYQ PAPER 2025
A field of \( 2 \times 10^{3} \text{ A/m} \) produces a flux of \( 2.4 \times 10^{-5} \text{ Wb} \) in an iron bar having area of cross-section \( 0.2 \text{ cm}^2 \). The relative permeability of medium is:
- A 478
- B 380
- C 600
- D 750
Answer & Solution
Correct Answer
(A) 478
Step-by-step Solution
Detailed explanation
\( B = \frac{\Phi}{A} = \frac{2.4 \times 10^{-5} \text{ Wb}}{0.2 \times 10^{-4} \text{ m}^2} = 1.2 \text{ T} \) \( \mu = \frac{B}{H} = \frac{1.2 \text{ T}}{2 \times 10^{3} \text{ A/m}} = 6 \times 10^{-4} \text{ H/m} \)…
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