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Physics · 2025

JEE Main · 4 April 2025, Shift 1 · Q28

Which of the following are correct expression for torque acting on a body? A. τ = r × L B. τ =d/(d t)( r × p ) C. τ = r × (d p)/(d t) D. τ =I α E. τ…

Which of the following are correct expression for torque acting on a body? A. $\displaystyle \vec{\tau}=\vec{r} \times \vec{L}$ B. $\displaystyle \vec{\tau}=\frac{d}{d t}(\vec{r} \times \vec{p})$ C. $\displaystyle \vec{\tau}=\vec{r} \times \frac{d \vec{p}}{d t}$ D. $\displaystyle \vec{\tau}=I \vec{\alpha}$ E. $\displaystyle \vec{\tau}=\vec{r} \times \vec{F}$ ( $\displaystyle \vec{r}=$ position vector; $\displaystyle \vec{p}=$ linear momentum; $\displaystyle \vec{L}=$ angular momentum; $\displaystyle \vec{\alpha}=$ angular acceleration; $\displaystyle I=$ moment of inertia; $\displaystyle \vec{F}=$ force; $\displaystyle t=$ time)Choose the correct answer from the options given below:
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JEE Main 2025 Physics question, with the answer from NTA’s final answer key. Where our answers come from.