Embibe Experts Solutions for Chapter: Electromagnetic Waves, Exercise 1: Manipur Board-2018

Name the part of electromagnetic waves which is used in radiography?

Arrange the given four electromagnetic waves in ascending order of their wavelengths.

$1.$Light ray  $2.$ $\mathrm{\gamma }-$ray  $3.$ Ultraviolet ray  $4.$ $\mathrm{X}-$ray

The electric field vector of a plane electromagnetic wave oscillates sinusoidally at a frequency of $300 \mathrm{MHz}$. What is its wavelength?

What is displacement current and write the modified Ampere's circuital law.

Give the frequency range of FM (frequency modulated) radio band.

The magnetic field in a plane electromagnetic wave is given by ${\mathrm{B}}_{\mathrm{y}}=\left(2\times {10}^{-7}\right)\mathrm{T} \sin \left(0.5\times {10}^3\mathrm{z}-1.5\times {10}^{11}\mathrm{t}\right)$

Write the expression for the electric field. $\left(\mathrm{c}=3\times {10}^8{\mathrm{ms}}^{-1}\right)$

A massage signal of frequency $5 \mathrm{KHz}$ And peak voltage of $10 \mathrm{V}$ is used to modulate a carrier wave of frequency $1 \mathrm{MHz}$ And peak voltage of $20 \mathrm{V}$. Determine modulation index, the side bands produced.