JEE MATHS UNIT 12
QUIZ NO 4
TOTAL QUESTIONS = 20


1. The magnitude of the vector 3i + 4j is


2. If a = 2i - j and b = i + j, then a · b is


3. The cross product of two parallel vectors is always


4. The magnitude of a unit vector is


5. The projection of a vector a = 3i + 4j on b = i + j is


6. If a = i + j + k and b = 2i - j + k, then the value of a × b is


7. The dot product of two vectors is equal to


8. The scalar triple product of a, b, and c is equal to


9. The area of a triangle formed by vectors a = 3i - j and b = i + j is


10. The volume of a parallelepiped formed by vectors a, b, and c is given by


11. The magnitude of the cross product of vectors a = 3i + 4j and b = i - j is


12. If a = i + 2j and b = 3i + 4j, then a and b are


13. The direction cosines of the vector i + j are


14. If the cross product of two vectors is zero, the vectors are


15. The scalar projection of a vector a on b is given by


16. The angle between two vectors a and b is 90° if


17. If a = 2i + j + k and b = i - 2j + k, then the value of a × b is


18. The magnitude of vector a = 4i - 3j is


19. The dot product of two unit vectors is equal to


20. If a = i + 2j - k and b = 3i - j + k, then the angle between a and b is



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