JEE PHYSICS MCQ: SYSTEM OF PARTICLES

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Application +4 | -1

Two loops

P

and

Q

are made from a uniform wire. The radii of

P

and

Q

are

r_1

and

r_2

respectively, and their moments of inertia are

I_1

and

I_2

respectively. If

I_2=4 I_1

, then

\frac{r_2}{r_1}

equals -

View answer and explanation

Correct option: B

4^{1 / 3}

Option B (

4^{1 / 3}

) is correct because the ratio of radii is proportional to the cube root of the ratio of moments of inertia.

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\mathrm{AB}

\mathrm{L}

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x

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\mathrm{A}

\mathrm{b}

1.0 \mathrm{~g}

8 \mathrm{~cm}

\omega = {t^4} + 2{t^3}

t = 1\,sec

\left( {rad\,{s^{ - 2}}} \right)