MCQOPTIONS
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MCQOPTIONS
This section includes 36 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
? ? If A=Ax i^ + Ay j^ + Az K^ B = Bx i^ + By j^ + Bz K^ then |
| A. | ?? A. B = Ax Bx + Ay By + Az Bz |
| B. | ?? A. B = Ax By + Ay Bz + Az By |
| C. | ?? A. B = Ay Bz + Az By + Az Bx |
| D. | ?? A. B = Ax Bz + Ay By + Az Bx |
| Answer» B. ?? A. B = Ax By + Ay Bz + Az By | |
| 2. |
? The unit vector in the direction of vector A = 2 i^ -2j^ + k^ is |
| A. | 2i^ - 2j^ + k^ |
| B. | (2i^ - 2j^ +k^)/9 |
| C. | (2i^ - 2j^ +k^)/3 |
| D. | (2i^ - 2j^ +k^)/5 |
| Answer» D. (2i^ - 2j^ +k^)/5 | |
| 3. |
A vector can be multiplied by a number. The number may be |
| A. | Dimensionless |
| B. | Dimensional scalar |
| C. | Negative |
| D. | All a, b and c are correct |
| Answer» E. | |
| 4. |
Addition of vector obeys |
| A. | Commutative law |
| B. | Distributive law |
| C. | Associative law |
| D. | All given laws in a , b and c |
| Answer» E. | |
| 5. |
Angle between two vectors A and B can be determined by |
| A. | Their dot product |
| B. | Their cross product |
| C. | Head to tail rule |
| D. | Right hand rule |
| Answer» B. Their cross product | |
| 6. |
Cos?i^ + Sin?j^ is a |
| A. | Vector |
| B. | Position vector |
| C. | Vector in the direction at angle ? with x-axis |
| D. | Unit vector in the direction at angle ? with x-axis |
| Answer» E. | |
| 7. |
If A=B, which of the following is not correct? |
| A. | A.B = A^ B^ |
| B. | |A| = |B| |
| C. | |A^| = |B^| |
| D. | AB^ = BA^ |
| Answer» B. |A| = |B| | |
| 8. |
If east, west, north, south, up and down are representing the direction of unit vectors, then east x south has direction along |
| A. | West |
| B. | North |
| C. | Down |
| D. | Up |
| Answer» D. Up | |
| 9. |
In which quadrant the two rectangular components of a vector have same sign? |
| A. | 1st |
| B. | 2nd |
| C. | Both 1st and 3rd |
| D. | 4th |
| Answer» D. 4th | |
| 10. |
In which quadrant, only value of tan will be positive? |
| A. | First |
| B. | Second |
| C. | Third |
| D. | Both 1st and 3rd |
| Answer» E. | |
| 11. |
It is easier to turn a steering wheel with both hands than with a single hand because |
| A. | Accelerating force increases on the wheel |
| B. | Two forces act on the wheel |
| C. | Two hands provide firm grip |
| D. | Couple acts on the wheel |
| Answer» E. | |
| 12. |
Torque is defined as |
| A. | Turning effect of force |
| B. | Cross product of position vector and force |
| C. | Product of force and moment arm |
| D. | All a, b and c are correct |
| Answer» E. | |
| 13. |
Two vectors A and B are making angle ? with each other. The scalar projection of vector B on vector A is written as |
| A. | A.B/A |
| B. | A.B/B |
| C. | A.cos ? |
| D. | Both a and b are correct |
| Answer» B. A.B/B | |
| 14. |
Two vectors are A = 3i^+2j^ -k^& B = 3i^-2j^ +k^ , then |
| A. | B is anti parallel to A |
| B. | B is negative vector of A |
| C. | B has negative magnitude |
| D. | B is perpendicular to A |
| Answer» C. B has negative magnitude | |
| 15. |
Unit vector n^ is along |
| A. | X-axis |
| B. | Normal on a surface |
| C. | Y-axis |
| D. | Z-axis |
| Answer» C. Y-axis | |
| 16. |
What is the angle that the given vector makes with y-axis? A=2 i^+??12 j^ |
| A. | 30? |
| B. | 60? |
| C. | 90? |
| D. | 120? |
| Answer» C. 90? | |
| 17. |
Which one is a unit vector? |
| A. | ??3 i^ + ??3 j^ + ??3 k^ |
| B. | 1/??3 i^ + 1/??3 j^ +1/ ??3 k^ |
| C. | ??3 / 3 i^ + ??3 / 3 j^ + ??3 / 3 k^ |
| D. | Both b and c are correct |
| Answer» E. | |
| 18. |
Which one is not a correct relation? |
| A. | AxB = -BxA |
| B. | |AxB| = -|BxA| |
| C. | AxB = AB Sin?n^ |
| D. | BxA = AB Sin?(-n^) |
| Answer» C. AxB = AB Sin?n^ | |
| 19. |
Which one is not a type of dynamic equilibrium? |
| A. | Rotational equilibrium |
| B. | Translational equilibrium |
| C. | Static equilibrium |
| D. | Both a and c are corret answer. |
| Answer» D. Both a and c are corret answer. | |
| 20. |
Which one is not correct for a vector A= 2??2 i^ + ??2 j^? |
| A. | Has direction ?=45? with x-axis |
| B. | Has magnitude 2 |
| C. | Has magnitude 2 and direction ?=45? with y-axis |
| D. | Has magnitude -2 |
| Answer» E. | |
| 21. |
Maximum number of components of a vector may be |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Infinite |
| Answer» E. | |
| 22. |
Maximum number of rectangular components are |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Infinite |
| Answer» D. Infinite | |
| 23. |
Null vector is a vector which has |
| A. | Zero magnitude |
| B. | No specified direction |
| C. | Both a and b are correct |
| D. | Both a and b are not correct |
| Answer» D. Both a and b are not correct | |
| 24. |
The direction of vector product is given by |
| A. | Head to tail rule |
| B. | Right hand rule |
| C. | Left hand rule |
| D. | Triangular rule |
| Answer» C. Left hand rule | |
| 25. |
Rectangular coordinate system is also called |
| A. | Polar coordinate system |
| B. | Cartesian coordinate system |
| C. | Cylindrical coordinate system |
| D. | Spherical coordinate system |
| Answer» C. Cylindrical coordinate system | |
| 26. |
SI unit of torque is |
| A. | N.m |
| B. | Joule |
| C. | Both a and b are correct |
| D. | Neither a nor b is correct |
| Answer» B. Joule | |
| 27. |
The cross product i^ x j^ is equal to |
| A. | Zero |
| B. | One |
| C. | I^ |
| D. | K^ |
| Answer» E. | |
| 28. |
The cross product of two vectors is a negative vector when |
| A. | They are parallel vectors |
| B. | They are anti parallel vectors |
| C. | They are perpendicular vector |
| D. | They are rotated through 270? |
| Answer» E. | |
| 29. |
The direction of a vector in spece is specified by |
| A. | One angle |
| B. | Two angle |
| C. | Three angle |
| D. | No angle |
| Answer» D. No angle | |
| 30. |
The magnitude of cross product is equal to the dot product between them. The angle between the two vectors is |
| A. | 30? |
| B. | 45? |
| C. | 60? |
| D. | 180? |
| Answer» C. 60? | |
| 31. |
The dimension of torque is |
| A. | [ML2T-2] |
| B. | [MLT-2] |
| C. | [ML2T] |
| D. | [ML-2T-2] |
| Answer» B. [MLT-2] | |
| 32. |
The resultant of two forces of equal magnitudes is also equal to the magnitude of the forces. The angle between the two forces is |
| A. | 30? |
| B. | 60? |
| C. | 90? |
| D. | 120? |
| Answer» E. | |
| 33. |
The magnitude of i^. (j^ x k^) is |
| A. | 0 |
| B. | 1 |
| C. | -1 |
| D. | I^ |
| Answer» C. -1 | |
| 34. |
Three coplanar forces acting on a body keep it in equilibrium. They should therefore be |
| A. | Concurrent |
| B. | Non concurrent |
| C. | Parallel |
| D. | Non parallel |
| Answer» B. Non concurrent | |
| 35. |
Torque acting on a body determines |
| A. | Acceleration |
| B. | Linear acceleration |
| C. | Angular acceleration |
| D. | Direction of motion of the body |
| Answer» D. Direction of motion of the body | |
| 36. |
i^ . (j^ x k^) is equal to |
| A. | 1 |
| B. | I^ |
| C. | J^ |
| D. | K^ |
| Answer» B. I^ | |