Given A =hat{ i }+hat{ j }+hat{ k } and B =-hat{ i }-hat{ j }-hat{ k } , then ( A - B ) will make an

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3-1.Vectors

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Given $A =\hat{ i }+\hat{ j }+\hat{ k }$ and $B =-\hat{ i }-\hat{ j }-\hat{ k }$, then $( A - B )$ will make angle with $A$

A

$0^{\circ}$

B

$180^{\circ}$

C

$90^{\circ}$

D

$60^{\circ}$

Solution

(a)

$A – B =2 \hat{ i }+2 \hat{ j }+2 \hat{ k }=2\,A$

i.e. $A – B$ and $B$ are parallel.

Standard 11

Physics

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