1.

vec(A) and vec(B) are two vectors in a plane and vec(C ) is a vector perpendicular to this plance their resultant is :

Answer»

NEVER zero
Zero
LIES between `vec(A)` and `vec(B)`
lies between `vec(A)` and `-vec(B)`

Solution :RESULTANT of `vec(A)` and `vec(B)` lies in the plane CONTAINING `vec(A)` and `vec(B)` since `vec(C)` is perpendicular to plane of `vec(A)` and `vec(B)` . Hence their resultant can never be zero.


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