1
MHT CET 2024 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The magnetic moments associated with two closely wound circular coils A and B of radius $r_A=10 \mathrm{~cm}$ and $r_B=20 \mathrm{~cm}$ respectively are equal if $\left(N_A, I_A\right.$ and $N_B, I_B$ are number of turns and current of A and B respectively)

A
$2 N_A \mathrm{I}_{\mathrm{A}}=\mathrm{N}_{\mathrm{B}} \mathrm{I}_{\mathrm{B}}$
B
$\mathrm{N}_{\mathrm{A}}=2 \mathrm{~N}_{\mathrm{B}}$
C
$\mathrm{N}_{\mathrm{A}} \mathrm{I}_{\mathrm{A}}=4 \mathrm{~N}_{\mathrm{B}} \mathrm{I}_{\mathrm{B}}$
D
$ 4 N_A I_A=N_B I_B$
2
MHT CET 2024 3rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The magnetic susceptibility of the material of a rod is 599. The absolute permeability of the material of the rod will be [ $\mu_0=4 \pi \times 10^{-7}$ SI unit]

A
$2 \pi \times 10^{-4}$
B
$2.4 \pi \times 10^{-4}$
C
$4 \pi \times 10^{-4}$
D
$4.8 \pi \times 10^{-4}$
3
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

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 $\pi=3 \cdot 14$]

A
0.2512 s
B
$2.512 \mathrm{~s}$
C
25.12 s
D
251.2 s
4
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$\frac{\mathrm{H}}{\mathrm{B}}=\mu_0(1+\chi)$
B
$\frac{B}{H}=\mu_0(1+\chi)$
C
$\frac{\mathrm{H}}{\mathrm{B}}=\mu_0(\chi-1)$
D
$\frac{B}{H}=\mu_0(1-x)$
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