AIEEE 2004 | Rotational Motion Question 201 | Physics

One solid sphere $$A$$ and another hollow sphere $$B$$ are of same mass and same outer radii. Their moment of inertia about their diameters are respectively $${I_A}$$ and $${I_B}$$ such that

$${I_A} < {I_B}$$

$${I_A} > {I_B}$$

$${I_A} = {I_B}$$

$${{{I_A}} \over {{I_B}}} = {{{d_A}} \over {{d_B}}}$$ where $${d_A}$$ and $${d_B}$$ are their densities.

AIEEE 2004

MCQ (Single Correct Answer)

-1

A solid sphere is rotating in free space. If the radius of the sphere is increased keeping mass same which on of the following will not be affected ?

Angular velocity

Angular momentum

Moment of inertia

Rotational kinetic energy

AIEEE 2003

MCQ (Single Correct Answer)

-1

A particle performing uniform circular motion has angular frequency is doubled & its kinetic energy halved, then the new angular momentum is

$${L \over 4}$$

$$2L$$

$$4L$$

$${L \over 2}$$

AIEEE 2003

MCQ (Single Correct Answer)

-1

Let $$\overrightarrow F $$ be the force acting on a particle having position vector $$\overrightarrow r ,$$ and $$\overrightarrow \tau $$ be the torque of this force about the origin. Then

$$\overrightarrow {r.} \overrightarrow \tau = 0\,\,$$ and $$\overrightarrow {F.} \overrightarrow \tau \ne 0\,\,$$

$$\overrightarrow {r.} \vec \tau \ne 0{\mkern 1mu} {\mkern 1mu} $$ and $$\overrightarrow {F.} \overrightarrow \tau = 0\,\,$$

$$\overrightarrow {r.} \vec \tau \ne 0{\mkern 1mu} $$ and $$\overrightarrow {F.} \overrightarrow \tau \ne 0$$

$$\overrightarrow {r.} \vec \tau = 0{\mkern 1mu} $$ and $$\overrightarrow {F.} \overrightarrow \tau = 0\,\,$$

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