MHT CET 2021 24th September Evening Shift | Magnetism and Matter Question 21 | Physics

Two bar magnets '$$\mathrm{P}$$' and '$$\mathrm{Q}$$' are kept in uniform magnetic field '$$\mathrm{B}$$' with magnetic moments '$$\mathrm{M_P}$$' and '$$\mathrm{M_Q}$$' respectively. Magnet 'P' is oscillating with frequency twice that of magnet 'Q'. If the moment of inertia of the magnet 'P' is twice that of magnet 'Q' then

$$\mathrm{M}_{\mathrm{Q}}=2 \mathrm{M}_{\mathrm{P}}$$

$$\mathrm{M_P=2 M_Q}$$

$$\mathrm{M}_{\mathrm{P}}=8 \mathrm{M}_Q$$

$$\mathrm{M}_{\mathrm{Q}}=8 \mathrm{MP}_{\mathrm{P}}$$

MHT CET 2021 24th September Evening Shift

MCQ (Single Correct Answer)

-0

A magnetic dipole of magnetic moment $$\mathrm{M}$$, is freely suspended in a magnetic field of induction B. The minimum and maximum values of potential energy of the dipole, respectively are

$$-\mathrm{MB},+\mathrm{MB}$$

$$0, \mathrm{MB}$$

$$0,2 \mathrm{MB}$$

MB, 0

MHT CET 2021 24th September Morning Shift

MCQ (Single Correct Answer)

-0

A current '$$I$$' is flowing in a conductor of length '$$L$$' when it is bent in the form of a circular loop, its magnetic moment will be

$$\frac{\mathrm{IL}}{4 \pi^2}$$

$$4 \pi \mathrm{L}^2$$

$$\frac{4 \pi}{\mathrm{IL}^2}$$

$$\frac{\mathrm{IL}^2}{4 \pi}$$

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

-0

A bar magnet has length $$3 \mathrm{~cm}$$, cross-sectional area $$2 \mathrm{~cm}^2$$ and magnetic moment $$3 \mathrm{~Am}^2$$. The intensity of magnetisation of bar magnet is

$$2 \times 10^5 \mathrm{~A} / \mathrm{m}$$

$$3 \times 10^5 \mathrm{~A} / \mathrm{m}$$

$$4 \times 10^5 \mathrm{~A} / \mathrm{m}$$

$$5 \times 10^5 \mathrm{~A} / \mathrm{m}$$

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