1
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A current of 5 A flows through a toroid having a core of mean radius 20 cm . If 4000 turns of the conducting wire are wound on the core, then the magnetic field inside the core of the toroid is [permeability of free space $=4 \pi \times 10^{-7}$ SI units]

A
$8 \times 10^{-2} \mathrm{~Wb} / \mathrm{m}^2$
B
$6 \times 10^{-2} \mathrm{~Wb} / \mathrm{m}^2$
C
$5 \times 10^{-2} \mathrm{~Wb} / \mathrm{m}^2$
D
$2 \times 10^{-2} \mathrm{~Wb} / \mathrm{m}^2$
2
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A metal ball of radius $9 \times 10^{-4} \mathrm{~m}$ and density $10^4 \mathrm{~kg} / \mathrm{m}^3$ falls freely under gravity through a distance ' h ' and enters a tank of water. Considering that the metal ball has constant velocity, the value of $h$ is [coefficient of viscosity of water $=8.1 \times 10^{-4} \mathrm{pa}-\mathrm{s}, \mathrm{g}=10 \mathrm{~m} / \mathrm{s}^2$ density of water $\left.=10^3 \mathrm{~kg} / \mathrm{m}^3\right]$

A
20 m
B
18 m
C
15 m
D
12 m
3
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

When wavefronts pass from denser medium to rarer medium, the width of the wavefront

A
increases.
B
may increase or decrease.
C
decreases.
D
remains unchanged.
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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