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CBSE
Class 11 Physics
Systems Of Particles And Rotational Motion
Quiz 2
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The ratio of radii of gyration of a circular disc about a tangential axis in the plane of the disc and of a circular ring of the same radius about a tangential axis in the plane of the ring is
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$2:3$
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$2:1$
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$\sqrt5:\sqrt6$
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$1:\sqrt2$
The ratio of the radii of gyration of a circular disc to that of circular ring, each of same mass, each of same mass and same radius about their axes is
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$\sqrt3:\sqrt2$
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$1:\sqrt2$
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$\sqrt2:1$
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$\sqrt2:\sqrt3$
A disc is rotating with angular speed \omega. If the child sits on it, what is conserved
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angular momentum
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linear momentum
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kinetic energy
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potential energy
A solid sphere, disc and solid cylinder all of the same mass and made of same material are allowed to roll down (from rest) on the inclined plane, then
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solid sphere reaches the bottom first
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solid cylinder reaches the bottom first
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disc will reach the bottom first
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all reach the bottom at the same time
The moment of inertia of a thin uniform rod of mass $M$ and length $L$ about an axis passing through its mid-point and perpendicular to its length is $I_0$. Its moment of inertia about an axis passing through one of its ends and perpendicular to its length is
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$I_0+\frac{ML^2}{2}$
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$I_0+\frac{ML^2}{4}$
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$I_0+2ML^2$
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$I_0+ML^2$
0 h : 0 m : 1 s
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