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A physical quantity which has a directio...

A physical quantity which has a direction:-

A

Must be a vector

B

May be a vector

C

Must be a scalar

D

None of these

Text Solution

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The correct Answer is:
B
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Assertion (A): A physical quantity which can be described with both magnitude and direction is called as a vector quantity. Reason (R): All vector quantities are derived quantities.

ALLEN-MISCELLANEOUS-Exercise-01
  1. Force 3N, 4N and 12 N act at a point in mutually perpendicular directi...

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  2. The unit vactor parallel to the resultant of the vectors vec(A)=4hat(i...

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  3. A physical quantity which has a direction:-

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  4. The following sets of three vectors act on a body. Whose resultant can...

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  5. How many minimum number of coplanar vector having different magnitudes...

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  6. The resultant of two vectors vec(P) and vec(Q) is vec(R). If vec(Q) is...

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  7. Figure shows three vectors vec(a), vec(b) and vec(c), where R is the m...

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  8. A displacement vector, at an angle of 30^(@) with y-axis has an x-comp...

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  9. I started walking down a road in morning facing the sun. After walking...

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  10. A bird moves from point (1 m, -2 m, 3 m) to (4 m, 2 m, 3 m). If the sp...

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  11. Any vector in an arbitrary direction can always be replaced by two (or...

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  12. There are two force vectors, one of 5 N and other of 12 N at what angl...

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  13. A particle has displacement of 12m towards east and 5 m towards north ...

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  14. 21 coplanar non collinear forces (all of equal magnitude) maintain a b...

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  15. A vector vec(A) points verically upward and vec(B) points towards nort...

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  16. If |vec(A)xxvec(B)|=sqrt(3)vec(A).vec(B), then the value of |vec(A)+ve...

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  17. The projection of vec(A) on vec(B) is :-

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  18. Given that P=Q=R. If vec(P)+vec(Q)=vec(R) then the angle between vec(P...

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  19. At what angle must the two forces (x+y) and (x-y) act so that the resu...

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  20. The value of (vec(A)+vec(B)).(vec(A)xxvec(B)) is :-

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