1. The rectangular coordinate system is also called
A. Polar coordinate system
B. Cartesian coordinate system
C. Cylindrical coordinate system
D. Spherical coordinate system
✅ The correct answer is option B.
Vectors And Equilibrium MCQs
2. The direction of a vector in space is specified by
A. One angle
B. Two angle
C. Three angle
D. No angle
✅ The correct answer is option C.
3. Addition of vector obeys
A. Commutative law
B. Distributive law
C. Associative law
D. All given laws in A, B and C
✅ The correct answer is option D.
4. 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
✅ The correct answer is option D.
5. Unit vector n^ is along
A. X-axis
B. Normal on a surface
C. Y-axis
D. Z-axis
✅ The correct answer is option B.
6. Cosθi^ + Sinθj^ is a
A. Vector
B. Position Vector
C. Vector in the direction at angle θ with an x-axis
D. The unit vector in the direction at angle θ with an x-axis
✅ The correct answer is option D.
7. Maximum number of rectangular components are
A. 1
B. 2
C. 3
D. 4
✅ The correct answer is option C.
8. Maximum number of components of a vector may be
A. 1
B. 2
C. 3
D. Infinite
✅ The correct answer is option D.
9. Which one is not correct for a vector A= 2i+2j+3k?
A. Has direction 45° with an x-axis
B. Has magnitude 2
C. Has magnitude 2 and direction °=45° with a y-axis
D. Has magnitude -2
✅ The correct answer is option D.
10. 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°
✅ The correct answer is option D.