1
JEE Advanced 2024 Paper 1 Online
Numerical
+4
-0
A disc of mass $M$ and radius $R$ is free to rotate about its vertical axis as shown in the figure. A battery operated motor of negligible mass is fixed to this disc at a point on its circumference. Another disc of the same mass $M$ and radius $R / 2$ is fixed to the motor's thin shaft. Initially, both the discs are at rest. The motor is switched on so that the smaller disc rotates at a uniform angular speed $\omega$. If the angular speed at which the large disc rotates is $\omega / n$, then the value of $n$ is ___________.
![JEE Advanced 2024 Paper 1 Online Physics - Rotational Motion Question 5 English](https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1lwpvanw7/c14e01b2-7725-483a-85c2-07b6cdd9bbe0/85df0870-1ca6-11ef-9d61-4dd39b8c772f/file-6y3zli1lwpvanw8.png?format=png)
![JEE Advanced 2024 Paper 1 Online Physics - Rotational Motion Question 5 English](https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1lwpvanw7/c14e01b2-7725-483a-85c2-07b6cdd9bbe0/85df0870-1ca6-11ef-9d61-4dd39b8c772f/file-6y3zli1lwpvanw8.png?format=png)
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2
JEE Advanced 2024 Paper 1 Online
Numerical
+4
-0
A point source $\mathrm{S}$ emits unpolarized light uniformly in all directions. At two points $\mathrm{A}$ and $\mathrm{B}$, the ratio $r=I_A / I_B$ of the intensities of light is 2 . If a set of two polaroids having $45^{\circ}$ angle between their pass-axes is placed just before point $\mathrm{B}$, then the new value of $r$ will be __________.
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3
JEE Advanced 2024 Paper 1 Online
Numerical
+4
-0
A source (S) of sound has frequency $240 \mathrm{~Hz}$. When the observer (O) and the source move towards each other at a speed $v$ with respect to the ground (as shown in Case 1 in the figure), the observer measures the frequency of the sound to be $288 \mathrm{~Hz}$. However, when the observer and the source move away from each other at the same speed $v$ with respect to the ground (as shown in Case 2 in the figure), the observer measures the frequency of sound to be $n \mathrm{~Hz}$. The value of $n$ is ___________.
![JEE Advanced 2024 Paper 1 Online Physics - Waves Question 1 English](https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1lwpvs7oa/05f54ed9-becc-4433-bd99-762c9bca5acb/6de7dc90-1ca8-11ef-a7f1-8b6b33c30c4d/file-6y3zli1lwpvs7ob.png?format=png)
![JEE Advanced 2024 Paper 1 Online Physics - Waves Question 1 English](https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1lwpvs7oa/05f54ed9-becc-4433-bd99-762c9bca5acb/6de7dc90-1ca8-11ef-a7f1-8b6b33c30c4d/file-6y3zli1lwpvs7ob.png?format=png)
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4
JEE Advanced 2024 Paper 1 Online
Numerical
+4
-0
Two large, identical water tanks, 1 and 2 , kept on the top of a building of height $H$, are filled with water up to height $h$ in each tank. Both the tanks contain an identical hole of small radius on their sides, close to their bottom. A pipe of the same internal radius as that of the hole is connected to tank 2 , and the pipe ends at the ground level. When the water flows from the tanks 1 and 2 through the holes, the times taken to empty the tanks are $t_1$ and $t_2$, respectively. If $H=\left(\frac{16}{9}\right) h$, then the ratio $t_1 / t_2$ is ___________.
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Chemistry
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Mathematics
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Physics
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