The velocity of electromagnetic radiation in a medium of permittivity and permeability is given by:
1.
2.
3.
4.
The magnetic field amplitude of an electromagnetic wave is T. Its electric field amplitude if the wave is travelling in free space is:
1. \(6~\mathrm{Vm^{-1}}\)
2. \(60~\mathrm{Vm^{-1}}\)
3. \(\frac{10}{6}~\mathrm{Vm^{-1}}\)
4. None of these
A plane electromagnetic wave travels in free space along x-axis. At a particular point in space, the electric field along y-axis is 9.3 . The magnetic induction is:
1.
2.
3.
4.
Which statement is incorrect?
1. | Speed of light in free space \(=\frac{1}{\sqrt{\mu_0 \epsilon_0}}\) |
2. | Speed of light in the medium \(=\frac{1}{\sqrt{\mu \epsilon}}\) |
3. | \(\frac{E_0}{B_0}=c\) |
4. | \(\frac{B_0}{E_0}=c\) |
Consider an electric charge oscillating with a frequency of 10 MHz. The radiation emitted will have a wavelength equal to:
1. | 20 m | 2. | 30 m |
3. | 40 m | 4. | 10 m |
The velocity of electromagnetic wave is parallel to:
1.
2.
3.
4.
Which of the following statements is false regarding the properties of electromagnetic waves?
1. | Both electric and magnetic field vectors attain the maxima and minima at the same place and the same time |
2. | The energy in an electromagnetic wave is divided equally between electric and magnetic vectors |
3. | Both electric and magnetic field vectors are parallel to each other and perpendicular to the direction of propagation of the wave |
4. | These waves do not require any material medium for propagation |
The electric and the magnetic field, associated with an electromagnetic wave, propagating along the +z-axis, can be represented by:
1. | \(\left[\mathrm{E}=\mathrm{E}_0 \widehat{\mathrm{k}}, \mathrm{B}=\mathrm{B}_0 \hat{\mathrm{i}}\right]\) |
2. | \(\left[\mathrm{E}=\mathrm{E}_0 \widehat{\mathrm{j}}, ~\mathrm{B}={\mathrm{B}_0} \hat{\mathrm{j}}\right]\) |
3. | \(\left[\mathrm{E}=\mathrm{E}_0 \widehat{\mathrm{j}}, ~\mathrm{B}={\mathrm{B}_0} \hat{\mathrm{k}}\right]\) |
4. | \(\left[\mathrm{E}=\mathrm{E}_0 \widehat{\mathrm{i}}, ~\mathrm{B}={\mathrm{B}_0} \hat{\mathrm{j}}\right]\) |
The electric and magnetic fields of an electromagnetic wave are:
1. | In phase and parallel to each other |
2. | In opposite phases and perpendicular to each other |
3. | In opposite phases and parallel to each other |
4. | In phase and perpendicular to each other |
In an electromagnetic wave, energy density associated with a magnetic field will be:
1.
2.
3.
4.