Embibe Experts Solutions for Chapter: Electromagnetic Waves, Exercise 1: Level 1

According to Maxwell's hypothesis, a changing electric field gives rise to

A plane electromagnetic wave of frequency $50 \mathrm{MHz}$, travels in free space along the positive $x$-direction. At a particular point in space and time, the electric field is $\overrightarrow{E}=6.3\hat{\mathrm{j}} \mathrm{V} {\mathrm{m}}^{-1}$. The corresponding magnetic field $\overrightarrow{B}$, at the point will be $z\times {10}^{-8}\hat{\mathrm{k}} \mathrm{T}$, what is the value of $z$?

An EM wave enters from medium-(1) to medium-(2). The electric fields are ${\overrightarrow{\mathrm{E}}}_1={\mathrm{E}}_{01}\sin \left(\mathrm{kx}-\mathrm{\omega t}\right)\hat{\mathrm{j}}$ in medium-(1) & ${\overrightarrow{\mathrm{E}}}_2={\mathrm{E}}_{02}\sin \left(3\mathrm{kx}-\mathrm{\omega t}\right)\hat{\mathrm{j}}$ in medium $-\left(2\right).$ If $\frac{{\mathrm{\mu }}_{{\mathrm{r}}_1}}{{\mathrm{\mu }}_{{\mathrm{r}}_2}}=\frac{1}{4}$ and $\frac{{\mathrm{ϵ}}_{{\mathrm{r}}_2}}{{\mathrm{ϵ}}_{{\mathrm{r}}_1}}=\frac{n}{4}$, then find the value of $n$. (${\mu }_{\mathrm{r}} \& {ϵ}_{\mathrm{r}}$ are relative permeability & permittivity of medium)

Which of the following radiations has the least wavelength?

The energy of electromagnetic wave in vacuum is given by the relation

The waves used in telecommunication are

An accelerated electron would produce

Name the EM wave used for studying crystal structure of solids