Home › CBSE Class 11 › Physics › c9kineticenergy › Per NCERT §5.1.1, î · î (dot product of a unit v…
Per NCERT §5.1.1, î · î (dot product of a unit vector with itself) equals which value?
A-1
B1
C0
D2
Answer & Solution
Correct answer: B. 1
NCERT §5.1.1: cos 0° = 1 and magnitudes are 1, so î·î = ĵ·ĵ = k̂·k̂ = 1.
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