1
JEE Advanced 2024 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language

A particle of mass $m$ is moving in a circular orbit under the influence of the central force $F(r)=-k r$, corresponding to the potential energy $V(r)=k r^2 / 2$, where $k$ is a positive force constant and $r$ is the radial distance from the origin. According to the Bohr's quantization rule, the angular momentum of the particle is given by $L=n \hbar$, where $\hbar=h /(2 \pi), h$ is the Planck's constant, and $n$ a positive integer. If $v$ and $E$ are the speed and total energy of the particle, respectively, then which of the following expression(s) is(are) correct?

A
$r^2=n \hbar \sqrt{\frac{1}{m k}}$
B
$v^2=n \hbar \sqrt{\frac{k}{m^3}}$
C
$\frac{L}{m r^2}=\sqrt{\frac{k}{m}}$
D
$E=\frac{n \hbar}{2} \sqrt{\frac{k}{m}}$
2
JEE Advanced 2024 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language

Two uniform strings of mass per unit length $\mu$ and $4 \mu$, and length $L$ and $2 L$, respectively, are joined at point $\mathrm{O}$, and tied at two fixed ends $\mathrm{P}$ and $\mathrm{Q}$, as shown in the figure. The strings are under a uniform tension $T$. If we define the frequency $v_0=\frac{1}{2 L} \sqrt{\frac{T}{\mu}}$, which of the following statement(s) is(are) correct?

JEE Advanced 2024 Paper 1 Online Physics - Waves Question 3 English
A
With a node at $\mathrm{O}$, the minimum frequency of vibration of the composite string is $v_0$.
B
With an antinode at $\mathrm{O}$, the minimum frequency of vibration of the composite string is $2 v_0$.
C
When the composite string vibrates at the minimum frequency with a node at $\mathrm{O}$, it has 6 nodes, including the end nodes.
D
No vibrational mode with an antinode at $\mathrm{O}$ is possible for the composite string.
3
JEE Advanced 2024 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language

A glass beaker has a solid, plano-convex base of refractive index 1.60, as shown in the figure. The radius of curvature of the convex surface (SPU) is $9 \mathrm{~cm}$, while the planar surface (STU) acts as a mirror. This beaker is filled with a liquid of refractive index $n$ up to the level QPR. If the image of a point object $\mathrm{O}$ at a height of $h$ (OT in the figure) is formed onto itself, then, which of the following option(s) is(are) correct?

JEE Advanced 2024 Paper 1 Online Physics - Geometrical Optics Question 6 English
A
For $n=1.42, h=50 \mathrm{~cm}$.
B
For $n=1.35, h=36 \mathrm{~cm}$.
C
For $n=1.45, h=65 \mathrm{~cm}$.
D
For $n=1.48, h=85 \mathrm{~cm}$.
4
JEE Advanced 2024 Paper 1 Online
Numerical
+4
-0
Change Language

The specific heat capacity of a substance is temperature dependent and is given by the formula $C=k T$, where $k$ is a constant of suitable dimensions in SI units, and $T$ is the absolute temperature. If the heat required to raise the temperature of $1 \mathrm{~kg}$ of the substance from $-73^{\circ} \mathrm{C}$ to $27^{\circ} \mathrm{C}$ is $n k$, the value of $n$ is ________.

[Given: $0 \mathrm{~K}=-273{ }^{\circ} \mathrm{C}$.]

Your input ____
JEE Advanced Papers
EXAM MAP