I ^. (j^ x k^) is equal to______________?
A. 1
B. i^
C. j^
D. k^
If A=B, which of the following is not correct ?
If A=B, which of the following is not correct ?
A. A.B = A^ B^
B. |A| = |B|
C. |A^| = |B^|
D. AB^ = BA^
Two vectors are A = 3i^+2j^ -k^& B = 3i^-2j^ +k^ , then_____________?
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
Two vectors A and B are making angle θ with each other. The scalar projection of vector B on vector A is written as____________?
Two vectors A and B are making angle θ 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.cosθ
D. Both a and b are correct
In which quadrant the two rectangular components of a vector have same sign ?
In which quadrant the two rectangular components of a vector have same sign ?
A. 1st
B. 2nd
C. Both 1st and 3rd
D. 4th
What is the angle that the given vector makes with y-axis and A=2i+3j ?
What is the angle that the given vector makes with y-axis and A=2i+3j ?
A. 30°
B. 60°
C. 90°
D. 120°
A central force is that which__________________?
A central force is that which__________________?
A. Can produce torque
B. Cannot produce torque
C. Some time can produce torque some time cannot
D. Has no relation with torque
If A=Ax i^ + Ay j^ + Az K^ B = Bx i^ + By j^ + Bz K^ then______________?
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
The magnitude of i^. (j^ x k^) is________________?
The magnitude of i^. (j^ x k^) is________________?
A. 0
B. 1
C. -1
D. i^
In which quadrant, the only value of tan will be positive ?
In which quadrant, the only value of tan will be positive ?
A. First
B. Second
C. Third
D. Both 1st and 3rd