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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

Text Solution

Verified by Experts

The correct Answer is:
B
`|Delta a| = a d theta [because l = r theta]`
`Delta a= A vec(B) = O vec(B)- O vec(A)`
`Delta a= vec(a)- vec(a)= 0`
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