JEE Main 2019 (Online) 8th April Evening Slot | Rotational Motion Question 112 | Physics

JEE Main 2019 (Online) 8th April Evening Slot

MCQ (Single Correct Answer)

-1

An electric dipole is formed by two equal and opposite charges q with separation d. The charges have same mass m. It is kept in a uniform electric field E. If it is slightly rotated from its equilibrium orientation, then its angular frequency $$\omega$$ is :-

$$\sqrt {{{qE} \over {md}}} $$

$$\sqrt {{{qE} \over {2md}}} $$

$$\sqrt {{{qE} \over {-2md}}} $$

$$\sqrt {{{2qE} \over {md}}} $$

JEE Main 2019 (Online) 8th April Evening Slot

MCQ (Single Correct Answer)

-1

A rectangular solid box of length 0.3 m is held horizontally, with one of its sides on the edge of a platform of height 5m. When released, it slips off the table in a very short time t = 0.01s, remaining essentially horizontal. The angle by which it would rotate when it hits the ground will be (in radians) close to :- JEE Main 2019 (Online) 8th April Evening Slot Physics - Rotational Motion Question 113 English

JEE Main 2019 (Online) 8th April Evening Slot Physics - Rotational Motion Question 113 English

0.28

0.02

0.3

0.5

JEE Main 2019 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

-1

Four particles A, B, C and D with masses m_A = m, m_B = 2m, m_C = 3m and m_D = 4m are at the corners of a square. They have accelerations of equal magnitude with directions as shown. The acceleration of the centre of mass of the particles is : JEE Main 2019 (Online) 8th April Morning Slot Physics - Rotational Motion Question 116 English

JEE Main 2019 (Online) 8th April Morning Slot Physics - Rotational Motion Question 116 English

$${a \over 5}\left( {\mathop i\limits^ \wedge + \mathop j\limits^ \wedge } \right)$$

$${a \over 5}\left( {\mathop i\limits^ \wedge - \mathop j\limits^ \wedge } \right)$$

$${a }\left( {\mathop i\limits^ \wedge + \mathop j\limits^ \wedge } \right)$$

Zero

JEE Main 2019 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

-1

A thin circular plate of mass M and radius R has its density varying as $$\rho $$(r) = $$\rho $$₀r with $$\rho $$₀ as constant and r is the distance from its centre. The moment of Inertia of the circular plate about an axis perpendicular to the plate and passing through its edge is I = aMR². The value of the coefficient a is :

$${1 \over 2}$$

$${3 \over 2}$$

$${8 \over 5}$$

$${3 \over 5}$$

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