MHT-CET

23. Magnetism And Matter question bank (Physics)

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Q1.

An iron rod is placed parallel to a magnetic field of intensity $H = 2000 \text{ A/m}$. The magnetic flux through the rod is $\phi = 6 \times 10^{-4} \text{ Wb}$ and its cross-sectional area is $A = 3 \text{ cm}^2$. The magnetic permeability $\mu$ of the rod in $\text{Wb/A} \cdot \text{m}$ is:

(A)

$10^{-1}$

(B)

$10^{-2}$

(C)

$10^{-3}$

(D)

$10^{-4}$

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Q2.

An iron rod is placed parallel to a magnetic field intensity of $1000 \text{ A/m}$. The magnetic flux through the rod is $3 \times 10^{-4} \text{ Wb}$ and its cross-sectional area is $1.5 \text{ cm}^2$. The magnetic permeability of the rod in $\text{Wb/(A} \cdot \text{m)}$ is:

(A)

$2 \times 10^{-2}$

(B)

$2 \times 10^{-3}$

(C)

$2 \times 10^{-4}$

(D)

$1 \times 10^{-2}$

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