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If A=4i+4j+4k and b=3i+j+4k, then angle between vectors A and B is
Options
(a) 180ﾟ
(b) 90ﾟ
(c) 45ﾟ
(d) 0ﾟ
Correct Answer:
90ﾟ
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
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Difficulty Level: Easy
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The ionisation potential of hydrogen-atom is -13.6 eV. An electron in the groundstate
- A student performs an experiment to determine the Young’s modulus of a wire
- A point source emits sound equally in all directions in a non-absorbing medium.
- Assertion(A) :The change in kinetic energy of a particle is equal to the work done
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Difficulty Level: Easy (1008)
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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a.b=|a||b|cos(x)
(4,4,-4) (3,1,4) = 4×3+4×1+(-4)x4
= 12+4-16
=0