NEET UG PHYSICS MCQ: MOTION IN PLANE

1 Hard

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Understanding +4 | -1

A vector

\mathbf{a}

is turned without a change in its length through a small angles

d \theta

. The value of

|\Delta \mathbf{a}|

and

\Delta a

are, respectively.

View answer and explanation

Correct option: B

a \cdot d \theta, 0

Option B (

a \cdot d \theta, 0

) is correct because the magnitude of the change in the vector is

a d\theta

and the change in the magnitude of the vector is 0 since the length remains constant.

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\overrightarrow{\mathrm{A}}

\overrightarrow{\mathrm{B}}

{\cot ^{ - 1}}\left( 2 \right)