Question

iii) The magnitude of scalar product of two
unit vectors perpendicular to each other is
(A) zero
(B) 1
(C)-1
(D) 2
4
A​

Answer 1

Answer:

zero

Explanation:

scalar product:

A( vector).B( vector)= AB cos@

( since perpendicular means @= 90° ,. cos90°= 0 )

such that , AB × 0 = 0

Answer 2

Answer:

The correct answer is (A) zero.

Explanation:

Let the two vectors be A and B.

For finding the magnitude of scalar products of two unit vectors, we need to find the dot product.

A.B = ABcosθ

So, A.B = AB cos 90 ( as the two vectors are perpendicular to each other so the angle between them is 90°).

As we know the value of cos90 is 0 so it becomes AB *0 = 0.

So the magnitude between the two vectors is zero.