MHT CET 2024 3rd May Morning Shift | Magnetism and Matter Question 9 | Physics

A magnetic needle of magnetic moment $6 \times 10^{-2} \mathrm{Am}^2$ and moment of inertia $9.6 \times 10^{-5} \mathrm{~kg} \mathrm{~m}^2$ performs simple harmonic motion in a magnetic field of 0.01 T . Time taken to complete 10 oscillations is [Take $\pi=3 \cdot 14$]

0.2512 s

$2.512 \mathrm{~s}$

25.12 s

251.2 s

MHT CET 2024 3rd May Morning Shift

MCQ (Single Correct Answer)

-0

The relation between total magnetic field (B), magnetic intensity $(\mathrm{H})$, permeability of free space $\left(\mu_0\right)$ and susceptibility $(\chi)$ is

$\frac{\mathrm{H}}{\mathrm{B}}=\mu_0(1+\chi)$

$\frac{B}{H}=\mu_0(1+\chi)$

$\frac{\mathrm{H}}{\mathrm{B}}=\mu_0(\chi-1)$

$\frac{B}{H}=\mu_0(1-x)$

MHT CET 2024 2nd May Evening Shift

MCQ (Single Correct Answer)

-0

A ferromagnetic material is heated above its curie temperature. The correct statement from the following is that

ferromagnetic domains are perfectly arranged.

ferromagnetic domains become random.

ferromagnetic domains are not influenced.

ferromagnetic material changes itself into diamagnetic material.

MHT CET 2024 2nd May Morning Shift

MCQ (Single Correct Answer)

-0

At certain place a magnet makes 30 oscillations per minute. At another place if the magnetic induction is increased by two times the magnetic induction at first place, then the time period of same magnet will be

$\frac{2}{\sqrt{3}} \mathrm{~s}$

$2 \sqrt{3} \mathrm{~s}$

$\frac{\sqrt{3}}{2} \mathrm{~s}$

$\sqrt{3} \mathrm{~s}$

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