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(veca-vecb)xx(veca+vecb) is equal to...

`(veca-vecb)xx(veca+vecb)` is equal to

A

0

B

`vecaxxvecb`

C

`2(vecaxxvecb)`

D

`abs(a^2)+abs(b^2)`

Text Solution

Verified by Experts

The correct Answer is:
C
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PATHFINDER-VECTOR-I AND VECTOR-II-QUESTION BANK
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  2. Two vectors vecA and vecB have magnitudes 2 and 2sqrt2 respectively. I...

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  3. (veca-vecb)xx(veca+vecb) is equal to

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  4. The vector vecaxx(vecbxxveca) is

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  5. vecA.(vecAxxvecB) is

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  6. A vector vectorA points vertically downward and vecB points towards no...

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  7. A force vecF=3hatj acts on the road a a point P(1,0,0). Then the torqu...

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  8. The angle between the vector vecA and vecB is 0. The value of the trip...

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  9. If veca and vecb are two vectors then the value of (veca+vecb) xx (vec...

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  10. The velocity of a particle is vecv=6hati+2hatj-2hatk. The component of...

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  11. The value of hatixx(hatixxveca)+hatjxx(hatjxxveca)+hatkxx(hatkxxveca) ...

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  12. If vector vecA and vecB have an angletheta between them, then value of...

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  13. A particle undergoes three successive displacements given by vecs1=sqr...

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  14. The resultant of vecA and vecB is R1. On reversing the vector vecB, th...

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  15. If the sum of two unit vectors is a unit vector,then magnitude of diff...

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  16. The sum of two vectors vecA and vecB is at right angles of their diffe...

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  17. A vector having magnitude 30 unit makes equal angles with each of X,Y ...

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  18. If hatA is unit vector in a given direction then, the value of hatA.(d...

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  19. If vecF1 and vecF2 are two vectors of equal magnitudes F such abs(vecF...

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  20. If a vector vecp is making angles alpha,beta and gamma respectively wi...

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