Mathematics MCQS for class 12 with Answers Chapter 7

If j & K are two unit vectors then jx k =

1

0

-1

Commutative law holds in

None of these

Inner product

Cross product in three vectors

Vector product

If a & b are vectors along two adjacent sides of a triangle then area of triangle is:

1/2 |a x b|

ab

|a. b|

a . b

The cross product or vector product of two vectors is defined

Only in plane

Only in space

None of these

Both a and c

i . (j x k) is equal to

1

2

-1

0

Two vectors are said to be negative of each other if they have _______ magnitude but _________ direction

None of these

Opposite, same

Same, same

Same, Opposite

The magnitude of vector is also called its

Norm

Parameter

Variables

Point

If the angle

Collinear

Perpendicular

Both(b)&(c)

Parallel

Work done of a force on a particle.

Zero

None of these

Scalar quantity

Vector quantity

The null or zero vector in R³ is O = ____________

None of these

[0,0]

[0,0,0]

[0]