1
MHT CET 2025 21st April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Using Bohr's quantization condition, the rotational kinetic energy in the third orbit for a diatomic molecule is ( $h=$ Planck's constant, $\mathrm{I}=$ moment of inertia of diatomic molecule)

A
$\frac{9 h^2}{8 \pi^2 I}$
B
$\frac{3 \mathrm{~h}^2}{8 \pi^2 \mathrm{I}}$
C
$\frac{6 h^2}{8 \pi I}$
D
$\frac{12 h^2}{7 \pi^2 I}$
2
MHT CET 2025 21st April Evening Shift
MCQ (Single Correct Answer)
+1
-0

A body is rotating about its own axis. Its rotational kinetic energy is ' x ' and its angular momentum is ' $y$ '. Hence its moment of inertia about its own axis is

A
$\frac{x^2}{2 y}$
B
$\frac{y^2}{2 x}$
C
$\frac{x}{2 y}$
D
$\frac{y}{2 x}$
3
MHT CET 2025 21st April Evening Shift
MCQ (Single Correct Answer)
+1
-0

A ray of light travelling through rarer medium is incident at a very small angle ' $i$ ' on a glass slab and after refraction its velocity is reduced by $20 \%$. The angle of deviation is

A
$\frac{\mathrm{i}}{5}$
B
$\frac{\mathrm{i}}{8}$
C
$\frac{\mathrm{i}}{4}$
D
$\frac{\mathrm{i}}{2}$
4
MHT CET 2025 21st April Evening Shift
MCQ (Single Correct Answer)
+1
-0

A body starts from rest and moves with a uniform acceleration. The ratio of the distance covered by the body in the $n^{\text {th }}$ second of its motion to the total distance travelled in n second is

A
$\frac{2}{n^2}-\frac{1}{n}$
B
$\frac{2}{n}-\frac{1}{n^2}$
C
$\frac{1}{\mathrm{n}}-\frac{1}{\mathrm{n}^2}$
D
$\frac{2}{\mathrm{n}^2}+\frac{1}{\mathrm{n}}$
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