Physics MCQs

Page No. 43

The direction of the vector product is given by______________?


aHead to tail rule


bRight-hand rule


cLeft-hand rule


dTriangular rule


View Answer Right-hand rule

I ^. (j^ x k^) is equal to______________?


a1


b i^


cj^


dk^


View Answer 1

If A=B, which of the following is not correct ?


aA.B = A^ B^


b|A| = |B|


c|A^| = |B^|


dAB^ = BA^


View Answer A.B = A^ B^

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


dB 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____________?


aA.B/A


bA.B/B


cA.cosθ


dBoth a and b are correct


View Answer A.B/A

In which quadrant the two rectangular components of a vector have same sign ?


a 1st


b2nd


cBoth 1st and 3rd


d4th


View Answer Both 1st and 3rd

What is the angle that the given vector makes with y-axis and A=2i+3j ?


a30°


b60°


c90°


d120°


View Answer 60°

A central force is that which__________________?


aCan produce torque


b Cannot produce torque


cSome time can produce torque some time cannot


dHas no relation with torque



If A=Ax i^ + Ay j^ + Az K^ B = Bx i^ + By j^ + Bz K^ then______________?


aA. B = Ax Bx + Ay By + Az Bz


bA. B = Ax By + Ay Bz + Az By


cA. B = Ay Bz + Az By + Az Bx


dA. B = Ax Bz + Ay By + Az Bx



The magnitude of i^. (j^ x k^) is________________?


a 0


b1


c-1


di^


View Answer 1

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