Physics XI Karachi Board MCQs Chapter 2

Chapter 2 - Scalars and Vectors
1. Physical quantity, which can be completely specified by its magnitude only, is called __________.

(Scalars, Vectors, None of above)

2. Physical quantity, which can be completely specified by its magnitude as well as direction, is called __________.

(Scalars, Vectors, None of Above)

3. Two or more than two scalars measured in the same system of units are equal only if they have the __________.

(Same Magnitude, Same magnitude and direction, Same direction)

4. Vectors are denoted by __________.

(or a, b, c)

5. Magnitude of vectors is denoted by __________.

(or a, b, c)

6. Two vectors are equal without any consideration of their initial point only if they have __________.

(Same magnitude, Same magnitude and similar direction, Same direction)

7. The tail end of a vector line is called __________.

(Initial point of the vector, terminal point of the vector, final point of the vector)

8. The magnitude of a vector is always treated as __________.

(Negative, Non-Negative, Negative and Positive both)

9. In parallelogram law of vector addition the resultant of the vector is represented by __________.

(Diagonal of the parallelogram, any adjacent side of the parallelogram, opposite side of the parallelogram)

10. Law of cosine is normally used to determine the __________.

(Magnitude of resultant, direction of resultant, both magnitude and direction of the resultant)

11. The product of number “m” and vectorgenerates a new vector. The magnitude of the product is represented by __________.

(B = |m|A, A = |m|B, |m| = BA)

12. Law of Sine is normally used for determination of __________.

(Magnitude of resultant, Direction of Resultant, Both Magnitude and Direction)

13. m= m is governed by __________.

(commutative law for multiplication, Associative law for multiplication, Distributive law for multiplication)

14. m= (mn)is governed by __________.

(Commutative law for multiplication, Associative law for multiplication, Distributive law for multiplication)

15. (m + n) = m = n follows __________.

(Commutative law, Associative Law, Distributive Law)

16. The division of a vector by a positive number n is given by= |m| where m = 1/n the direction of is __________.

(same as , oppoosite to , parallel to itself)

17. The division of vector by a negative number n is given by = |m| where m = 1/n the direction theis __________.

(same as , oppoosite to , parallel to itself)

18. A unit vector is represented by __________.

(,,)

19. The unit vectors are __________.

(parallel to each other, perpendicular to each other, none of the above)

20. The sum of rectangular components vector produces the original vector, which is represented by __________.

21. The magnitude of vectoris given by __________.

, , )

22. The dot product of unit vectors and is equal to __________.

(i, , )

23. The dot product of unit vectors and is equal to __________.

(

24. The cross product of unit vector and is equal to __________.

(0, 1, )

25. The vector product of and is ___________.

(-,, r)

26. A vector which can be displaced parallel to it self and applied at any point is known as __________.

(Null vector, Free Vector, Position Vector)

27. A vector, which can represent the position of a point with respect to some fixed point in coordinate system, is called __________.

(Null Vector, Free Vector, Position Vector)

28. If two vectors which are equal in magnitude but opposite in direction, their combination produces __________.

(Null Vector, Free Vector, Position Vector)

29. The horizontal component of vector is given by __________.

(A cos q, A sin q, A tan q)

30. The vertical component of vector is given by __________.

(Acosq, Asinq, Atan)




31. The product of magnitude of two vectors and cosine of the angle between them is called __________.

(Scalar Product, Vector Product, None of the above)

32. The product of magnitude of two vectors and sine of the angle between them is called __________.

(Scalar Product, Vector Product, None of the above)

33. Ifandare the two vectors then __________.

34. Two or more vectors are added by __________.

(Head to tail rule, simple addition, none of these)

35. The angle between the horizontal and vertical component of a vector is __________.

(90°, 0°, 180°)

36. If the resultant of two forces of magnitude 3N and 4N is 5N then the angle between these two forces is __________.

(0°, 45°, 90°)

37. The dot product of two vectors is zero when they are __________.

(In the same Direction, Perpendicular to each other, In the opposite direction)

38. If the cross product of two vectors is zero they are __________.

(Parallel to each other, Perpendicular to each other, Opposite in direction)

39. Ifare __________.

(Parallel to Each other, either A or B is a null vector, perpendicular to each other)

40. The cross product of two vector is a __________.

(Scalar, Vector, None of these)