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Q.

Two vectors P→ and Q→ are inclined to each other at angle θ. Which of the following is the unit vector perpendicular to P→ and Q→ ?

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a

P→×Q→P⋅Q

b

P^×Q^sin⁡θ

c

P→×Q^PQsin⁡θ

d

P^×Q→PQcos⁡θ

answer is B.

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Detailed Solution

P^×Q^,P→×Q^ as well asP^×Q→ all are perpendicular to P→ and Q→. Here only in case (2), the magnitude is equal to 1.
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