## Physics XI Karachi Board [vectors] MCQS Online Test - 2

Physics Aptitude Test. **21 **Questions from Chapter 02 vectors.
**Q1.** Unit vector is used to specify

**Q2.** Vector A=Axi+Ay j lies in

**Q3. **The angle of a vector A= Ax I —Ay j with the x-axis will be in between

**Q4.** A vector having magnitude equal to given vector but in opposite direction is called

**Q5. ** The magnitude of resultant of three components of a vector is 3. Its x-component is 2, y-components is 1 then its z-component will be

**Q6.** Which pair of the following forces will never give resultant force of 2N?

**Q7. ** A vector making angle 63° with x - axis. Its ______ component will be longer

**Q8. ** Two forces each of 10N magnitude acting on A body, if the forces are Inclined at 30° and 60° with x-axis, the x- component of their resultant is

**Q9. **If the vector A and B are of magnitude 4 and 3 cm making of 30° and 90° respectively with x-axis, their scalar product will be

**Q10. **If A = Ai and B = B j then A.B is equal to

**Q11. **If the dot product of two non-zero vectors vanishes, the vectors will be

**Q12. **The scalar product of two vectors is negative when

**Q13. ** The dot product i. i = j. j = k .k is equal to

**Q14. ** If the dot product of two non-zero vectors A and B is zero their cross product will be magnitude.

**Q15. ** If F = 8 I – 2 j and r = 6 I + 8 k then F. r is

**Q16. ** Scalar product of a vector A with itself is

**Q17. ** If A and B are parallel then

**Q18. ** The angle between the vector A 2i + 3j — k and B = 4i + 6j

**Q19. ** The cross product of vector A with itself (A x A) is equal

**Q20. ** The cross product k x j is equal to

**Q21. ** If |A + B| = |A - B| the angle b/w the vectors is

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