Question

A vector →A points vertically upward and →B points towards the north. The vector product →A×→B is
(a) along the west
(b) along the east
(c) zero
(d) vertically downward.

Answer 1

Answer:

$\large\boxed{\sf{(a)\:along\:the\:west}}$

Explanation:

Given that a vector $\vec{ A }$points vertically upward and a vector $\vec{B}$ points towards the north.

To find the cross Product $\vec{A} \times \vec{B}$,

Curl the right hand palm from vector $\vec{A}$ , that is from vertical direction towards the north direction , vector $\vec{B}$.

Then, the thumb will give the resultant direction, which is (a) along the west.

Answer 2

The vector product $\rightarrow A \times \rightarrow B$ is along the west.

Explanation:

• $A \rightarrow \times B \rightarrow$ is the vector product and it points towards the west. Using the right-hand thumb rule, the direction can be determined.

• It is to be understood that the right-hand rule of Fleming shown the current flowing direction. With the thumb, the right hand is held, and middle finger and index finger is perpendicular mutually at right angles to each other.