JEE PYQ: Mathematics In Physics Question 8
Question 8 - 2021 (25 Feb Shift 2)
If $\vec{P} \times \vec{Q} = \vec{Q} \times \vec{P}$, the angle between $\vec{P}$ and $\vec{Q}$ is $\theta$ ($0° < \theta < 360°$). The value of ‘$\theta$’ will be
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Answer: (180)
Solution
If $\vec{P} \times \vec{Q} = \vec{Q} \times \vec{P}$ Only if $\vec{P} = 0$ Or $\vec{Q} = 0$ The angle b/w $\vec{P}$ & $\vec{Q}$ is $\theta$ ($0° < \theta < 360°$) So $\theta = 180°$
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