Per NCERT §3.3, multiplying a vector A by a NEGATIVE scalar -λ (with λ > 0) does what to the vector?
AHas no effect at all
BScales by -λ but keeps direction
CReverses direction only without scaling
DReverses direction and scales magnitude by λ
Answer & Solution
Correct answer: D. Reverses direction and scales magnitude by λ
NCERT §3.3: scalar × vector scales magnitude; sign flip reverses direction. λA same direction; (-λ)A opposite direction.
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