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A vector vec(a) is turned without a chan...

A vector `vec(a)` is turned without a change in its length through a small angle `d theta`. Find the value of `|Deltavec(a)|` and `Delta a`.

A

`0,a d theta`

B

`a d theta,0`

C

`0,0`

D

None of these

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The correct Answer is:
B
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