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NEET UG PHYSICS MCQ: MOTION IN PLANE

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Analyzing +4 | -1

Which of the following is not true? If

\vec{A}=3 \hat{i}+4 \hat{j}

and

\vec{B}=6 \hat{i}+8 \hat{j}

where

A

and

B

are the magnitudes of

\overrightarrow{\mathrm{A}}

and

\overrightarrow{\mathrm{B}}

View answer and explanation

Correct option: C

\vec{A} \cdot \vec{B}=48

Option C (

\vec{A} \cdot \vec{B}=48

) is not true because the dot product of

\vec{A}

and

\vec{B}

is actually 3(6) + 4(8) = 18 + 32 = 50, not 48.

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