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
Related Mcqs:
- 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 - Unit vector n^ is along______________?
A. X-axis
B. Normal on a surface
C. Y-axis
D. Z-axis - 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° - 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 - 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 a perpendicular vector
D. They are rotated through 270° - Two vectors are A = 3i^+2j^ -k^& B = 3i^-2j^ +k^ , then_____________?
A. B is anti-parallel to A
B. B is a negative vector of A
C. B has a negative magnitude
D. B is perpendicular to A - If A=B, which of the following is not correct ?
A. A.B = A^ B^
B. |A| = |B|
C. |A^| = |B^|
D. AB^ = BA^ - 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 - The magnitude of the 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° - A body in equilibrium__________________?
A. Always at rest
B. Always in uniform motion
C. May be at rest or in uniform motion
D. May be at rest or in motion