IAT (IISER) 2020 | IAT (IISER) Year Wise Previous Years Questions

Consider a solid rod of mass $m$ and uniform density resting against a vertical wall and horizontal floor as shown in the figure. The coefficients of friction of the rod with the wall and with the floor are given to be $\mu_1$ and $\mu_2$ respectively. Gravity is acting downwards with acceleration due to gravity $g$. What should be the value of the inclination angle $\alpha$ so that the rod stays in equilibrium? IAT (IISER) 2020 Physics - Rotational Motion Question 2 English

IAT (IISER) 2020 Physics - Rotational Motion Question 2 English

$\tan ^{-1}\left(\frac{\mu_1}{\mu_2}\right)$

$\tan ^{-1}\left(\frac{1-\mu_2}{2 \mu_1 \mu_2}\right)$

$\tan ^{-1}\left(\frac{1-\mu_1 \mu_2}{2 \mu_2}\right)$

$\tan ^{-1}\left(\frac{\mu_2}{\mu_1}\right)$ $$ N_1=f_2=\mu_2 N_2 $$

IAT (IISER) 2020

MCQ (Single Correct Answer)

-1

The charge distribution inside a sphere of radius $R=2 a / b$ is given by the volume charge density $\rho=a r^2-b r^3$, where $a$ and $b$ are constants and $r$ is the radial distance from the center of the sphere. At what distance from the center of the sphere, will the electric field go to zero?

$4 a / 3 b$

$3 a / 2 b$

$a / b$

$6 a / 5 b$

IAT (IISER) 2020

MCQ (Single Correct Answer)

-1

The acceleration due to earth's gravity on a point particle at a height $h$ above the surface of the earth is denoted by $g_o(h)$ and at a depth $d$ below the surface of the earth is denoted by $g_i(d)$. Consider the earth to be a sphere of radius $R$ with uniform mass density. Which of the following correctly represents the ratio $g_i(d) / g_o(d)$ ?

IAT (IISER) 2020 Physics - Gravitation Question 2 English Option 1

IAT (IISER) 2020 Physics - Gravitation Question 2 English Option 2

IAT (IISER) 2020 Physics - Gravitation Question 2 English Option 3

IAT (IISER) 2020 Physics - Gravitation Question 2 English Option 4

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