1
MHT CET 2021 21th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
1.85
B
0.15
C
$$-0.15$$
D
$$-0.85$$
2
MHT CET 2020 19th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$M \times \ell$
B
$\frac{M}{\ell}$
C
$\frac{2 M}{\pi}$
D
$M$
3
MHT CET 2020 19th October Evening Shift
MCQ (Single Correct Answer)
+1
-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

A
$7.2 \times 10^5 \mathrm{Am}^{-1}$
B
$7.2 \times 10^3 \mathrm{Am}^{-1}$
C
$7.2 \times 10^9 \mathrm{Am}^{-1}$
D
$7.2 \times 10^{12} \mathrm{Am}^{-1}$
4
MHT CET 2020 19th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

For a paramagnetic substance, the magnetic susceptibility is

A
large and negative
B
small and positive
C
large and positive
D
small and negative
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