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Let vec u be a vector coplanar with the ...

Let `vec u` be a vector coplanar with the vectors `vec a = 2 hat i + 3 hat j - hat k` and `vec b= hat j+hatk` If `vec u` is perpendicular to `vec a` and `vec u.vecb=24` then `|vecu|^2` is equal to

A

336

B

315

C

256

D

84

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The correct Answer is:
A
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VMC MODULES ENGLISH-VECTORS -JEE MAIN (ARCHIVE)
  1. Let vec u be a vector coplanar with the vectors vec a = 2 hat i + 3 ha...

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  2. If veca, vecb, vecc are the unit vectors such that veca + 2vecb + 2vec...

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  3. If the position vectors of the vertices A,B and C of a triangleABC are...

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  4. Let veca = hati + hatj +hatjk, vecc =hatj - hatk and a vector vecb be ...

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  5. Let veca=2hati+hatj-2hatk and vecb=hati+hatj. Let vecc be a vector suc...

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  6. The area (in sq units) of the parallelogram whose diagonals are along ...

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  7. If the vector vecb = 3hati + 4hatk is written as the sum of a vector v...

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  8. let veca, vecb and vecc be three unit vectors such that veca xx (vecb ...

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  9. In a triangle ABC , right angled at the vertex A , if the position vec...

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  10. Let ABC be a triangle whose circumcenter is at P, if the positions vec...

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  11. Let veca, vecb and vecc be non-zero vectors such that (veca xx vecb) x...

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  12. Given |veca|=|vecb|=1 and |veca + vecb|= sqrt3 if vecc is a vector suc...

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  13. Given a parallelogram ABCD. If |AB|=a, |AD|=b, |AC|=c, then DB*AB has ...

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  14. If [veca xx vecb vecb xx vecc vecc xx veca]=lambda[veca vecb vecc]^2,...

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  15. If the vectors vec(AB)=3hati+4hatk and vec(AC)=5hati-2hatj+4hatk are t...

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  16. Let hata and hatb be two unit vectors. If the vectors vecc=hata+2hatb ...

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  17. Let ABCD be a parallelogram such that vec A B= vec q , vec A D= vec p...

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  18. veca =1/sqrt(10)(3hati + hatk) and vecb =1/7(2hati +3hatj-6hatk), then...

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  19. The vectors veca and vecb are not perpendicular and vecac and vecd are...

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  20. If the vectors phati+hatj+hatk, hati+qhatj+hatk and hati+hatj+rhatk(p!...

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