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The direction of vector vec(b) is North-...

The direction of vector `vec(b)` is North-East and that `vec( c )` is North-West `|vec(b)|=|vec( c )|=4`. If `vec(a)=vec( c )-vec(b)` then the magnitude and direction of the vectors `vec(a)` are …………….

A

`4sqrt(2)` towards north

B

`4sqrt(2)` towards west

C

4 towards west

D

4 towards south

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The correct Answer is:
B
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KUMAR PRAKASHAN-VECTOR ALGEBRA -Solutions of NCERT Exemplar Problems (Multiple Choice Questions (MCQs) )
  1. ABCDEF is a regular hexagone. AB+AC+AD+AE+AF=lambda AD then lambda = …...

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  2. If the vectors 10hati+3hatj,12hati-15hatj and a hati+11 hatj are colli...

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  3. The direction of vector vec(b) is North-East and that vec( c ) is Nort...

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  4. If bar(x)=(-1,4,-2),bar(y)=(-4,16,-8) then |bar(x)+bar(y)|…………|bar(x)|...

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  5. The unit vector in the direction of the sum of the vectors (1, 1, 1),(...

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  6. The vector 2hati+2hatj-hatk makes ………………measure of angles with the axe...

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  7. The unit vector in the direction 6hati-2hatj+3hatk is ………….

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  8. The unit vector parallel to the vecotr bar(a)-bar(b) is ……………. where...

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  9. If bar(a)=(1,1,1),bar(b)=(4,-2,3) and bar( c )=(1,-2,1) then the vect...

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  10. The unit vector in the opposite direction of bar(x)+bar(y)-2bar(z) is ...

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  11. The vector with magnitude 17sqrt(2) and in the opposite direction of (...

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  12. Out of the following …………. Is the unit vector in the direction of (3ha...

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  13. The position vector of the point P is (4, 5, -3). The distance of the ...

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  14. The position vector of a point A is (4, 2, -3). If the distance of the...

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  15. vec(a)=hati+hatj+hatk,vec(b)=hati-hatj+hatk and vec( c )=hati+2hatj-...

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  16. A(1, 1, 2), B(4, 3, 1) and C(2, 3, 5) are vertices of a triangle ABC. ...

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  17. The position vectors of two points A and B are respectively 6vec(a)+2v...

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  18. The position vectors of the vertices of triangle are 3hati+4hatj+5hatk...

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  19. The angle between the unit vectors vec(a) and vec(b) is 2theta. Where ...

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  20. squareABCD is a parallelogram. (A(1)) and B(1) are midpoints of the si...

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