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A vector is represented by 3hati+hatj+2h...

A vector is represented by `3hati+hatj+2hatk`. Its length in `XY` plane is

A

2

B

`sqrt(14)`

C

`sqrt(10)`

D

`sqrt(5)`

Text Solution

Verified by Experts

The correct Answer is:
C

(c ) In XY-plane vector ia `3hati+hatj`
` therefore`Lrngth in XY-plane`=sqrt(9+1)=sqrt(10)`
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