(A) The direction of propagation of an electromagnetic wave is given by the direction of the Poynting vector,which is $\vec E \times \vec B$.Given tha

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

$\vec E = {E_0}\hat i, \vec B = {B_0}\hat j$

(A) The direction of propagation of an electromagnetic wave is given by the direction of the Poynting vector,which is $\vec E \times \vec B$.Given that the wave propagates along the $+z-$ axis (unit vector $\hat k$),we must have $\hat E \times \hat B = \hat k$.Testing option $A$: $\hat i \times \hat j = \hat k$. This satisfies the condition.Therefore,the electric field is along the $x-$ axis and the magnetic field is along the $y-$ axis.

Class 11 Chemistry Data Entry - Chemistry Level 0 of all question bank

The electric and the magnetic field,associated with an $e.m.$ wave,propagating along the $+z-$ axis,can be represented by

AIPMT 2011 All AIPMT

A
$\vec E = {E_0}\hat i, \vec B = {B_0}\hat j$
B
$\vec E = {E_0}\hat k, \vec B = {B_0}\hat i$
C
$\vec E = {E_0}\hat j, \vec B = {B_0}\hat i$
D
$\vec E = {E_0}\hat j, \vec B = {B_0}\hat k$

Explore More

Browse All

Question Bank

All Subjects

Class 11 Questions

Class 11

Chemistry Questions

Chapter

Data Entry - Chemistry

Subtopic

Level 0 of all question bank

Previous Year

AIPMT 2011 Paper All AIPMT years →

$A$ sodium atom is in one of the states labeled 'Lowest excited levels'. It remains in that state for an average time of $10^{-8} \ s$,before it makes a transition back to a ground state. What is the uncertainty in energy of that excited state?

View Solution

$A$ uniform rod of mass $M$ and length $L$ is placed on a smooth horizontal surface. $A$ horizontal force $F$ is applied at one end of the rod perpendicular to its length. The acceleration of the centre of mass of the rod is:

View Solution

What is the concentration of nitrate ions $(NO_3^-)$ if equal volumes of $0.1 \ M \ AgNO_3$ and $0.1 \ M \ NaCl$ are mixed together (in $M$)?

View Solution

The component of vector $\overrightarrow{A} = a_x \hat{i} + a_y \hat{j} + a_z \hat{k}$ along the direction of $\hat{i} - \hat{j}$ is

TS EAMCET 2008

View Solution

Silica is added to roasted copper ore during smelting in order to remove

View Solution

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

The electric and the magnetic field,associated with an $e.m.$ wave,propagating along the $+z-$ axis,can be represented by

Similar Questions

$A$ sodium atom is in one of the states labeled 'Lowest excited levels'. It remains in that state for an average time of $10^{-8} \ s$,before it makes a transition back to a ground state. What is the uncertainty in energy of that excited state?

$A$ uniform rod of mass $M$ and length $L$ is placed on a smooth horizontal surface. $A$ horizontal force $F$ is applied at one end of the rod perpendicular to its length. The acceleration of the centre of mass of the rod is:

What is the concentration of nitrate ions $(NO_3^-)$ if equal volumes of $0.1 \ M \ AgNO_3$ and $0.1 \ M \ NaCl$ are mixed together (in $M$)?

The component of vector $\overrightarrow{A} = a_x \hat{i} + a_y \hat{j} + a_z \hat{k}$ along the direction of $\hat{i} - \hat{j}$ is

Silica is added to roasted copper ore during smelting in order to remove

Vedclass Test Series

Exam Paper Generator

Online Exam Module