MHT CET 2021 21th September Evening Shift | Magnetism and Matter Question 38 | Physics

The north pole of a long horizontal bar magnet is being brought towards closed circuit consisting of a coil. The direction of induced current produced in it is

anticlockwise

horizontal

vertical

clockwise

MHT CET 2021 21th September Morning Shift

MCQ (Single Correct Answer)

-0

What is susceptibility of a medium, if its relative permeability is 0.85?

1.85

0.15

$$-0.15$$

$$-0.85$$

MHT CET 2020 19th October Evening Shift

MCQ (Single Correct Answer)

-0

A steel wire of length / has a magnetic moment $M$. It is then bent into a semicircular arc. The new magnetic moment is

$M \times \ell$

$\frac{M}{\ell}$

$\frac{2 M}{\pi}$

$M$

MHT CET 2020 19th October Evening Shift

MCQ (Single Correct Answer)

-0

A domain in a ferromagnetic substance is in the form of a cube of side $1 \mu \mathrm{~m}$. If it contains $8 \times 10^{10}$ atoms and each atomic dipole has a dipole moment of $9 \times 10^{-24} \mathrm{Am}^2$, then the magnetisation of the domain is

$7.2 \times 10^5 \mathrm{Am}^{-1}$

$7.2 \times 10^3 \mathrm{Am}^{-1}$

$7.2 \times 10^9 \mathrm{Am}^{-1}$

$7.2 \times 10^{12} \mathrm{Am}^{-1}$

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