Explain the cross product of two vectors.

Vedclass pdf generator app on play store
Vedclass iOS app on app store
(N/A) Definition: The vector product or cross product of two vectors $\vec{a}$ and $\vec{b}$ is another vector $\vec{c}$,whose magnitude is equal to the product of the magnitudes of the two vectors and the sine of the smaller angle between them.
If the product of two vectors results in a vector quantity,then this product is called a vector product. Suppose there are two vectors $\vec{a}$ and $\vec{b}$ and the angle between them is $\theta$.
Therefore,the vector product is defined as $\vec{a} \times \vec{b} = |\vec{a}| |\vec{b}| \sin \theta \hat{n} = ab \sin \theta \hat{n}$,where $|\vec{a}| = a$ and $|\vec{b}| = b$.
Here,$\hat{n}$ is a unit vector perpendicular to the plane formed by $\vec{a}$ and $\vec{b}$.
This product is also known as the cross product $(\times)$.
If $\vec{a} \times \vec{b}$ is denoted by $\vec{c}$,then $\vec{c} = ab \sin \theta \hat{n}$.
The magnitude of the resulting vector is $c = ab \sin \theta$.
The direction of $\vec{c}$ is perpendicular to the plane containing $\vec{a}$ and $\vec{b}$,and its direction is determined by the right-hand screw rule.

Explore More

Similar Questions

$\vec{A}$ is a vector quantity such that $|\vec{A}| =$ nonzero constant. Which of the following expressions is true for $\vec{A}$?

$A$ vector perpendicular to $\hat{i}+\hat{j}+\hat{k}$ is:

The angle between two vectors $4\hat{i} + 3\hat{j} + \hat{k}$ and $-3\hat{i} + 2\hat{j} + 6\hat{k}$ is ....... $^o$

Show that $\vec{a} \cdot(\vec{b} \times \vec{c})$ is equal in magnitude to the volume of the parallelepiped formed by the three vectors $\vec{a}, \vec{b}$ and $\vec{c}$.

$\overrightarrow A = 2\hat i + 4\hat j + 4\hat k$ and $\overrightarrow B = 4\hat i + 2\hat j - 4\hat k$ are two vectors. The angle between them will be ........ $^o$.

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo