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§ Thermal & Waves · Kinetic Theory

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Thermal & WavesKinetic TheoryOnly One CorrectMedium

Q1.Let

\vec{a}

\vec{b}

be two vectors, and let

P

Q

and

R

be the points with position vectors

\vec{a}

\vec{b}

and

\vec{a}+\vec{b}

, respectively, with respect to the origin

O

. If

|\vec{a}+\vec{b}|=\sqrt{21}

|\vec{a}-\vec{b}|=3

, and

\vec{a}

and

(\vec{a}-\vec{b})

are perpendicular to each other, then the area of the triangle

OPR

citeJEE Advanced · 2026 · Paper 2

2026id · 384f1efb