In an electromagnetic wave, energy density associated with a magnetic field will be:

1. $\frac{1}{2}L{I}^2$

2. $\frac{B^2}{2{\mu }_0}$

3. $\frac{1}{2}{\mu }_0{B}^2$

4. $\frac{1}{2}\frac{q}{B^2}$

For a transparent medium, relative permeability and permittivity, ${\mu }_r$ $and$ ${\epsilon }_r$ are 1.0 and 1.44 respectively. The velocity of light in this medium would be:

1. 2.5$\times {10}^8$ m/s

2. 3 $\times {10}^8$ m/s

3. 2.08 $\times {10}^8$ m/s

4. 4.32 $\times {10}^8$ m/s

Which of the following statements is false regarding the properties of electromagnetic waves?

The most penetrating radiation out of the following is:
1. x-rays
2. β-rays
3. $\alpha$-rays
4. γ-rays

The maxwell's equation:

$\oint \overrightarrow{B}.\overrightarrow{dl}={\mu }_0\left(i+{\epsilon }_0.\frac{d{\varphi }_E}{dt}\right)$ is a statement of :

If an electromagnetic wave of frequency f = 3 MHz passes from vacuum into a dielectric medium with relative permittivity K= 4.0, then:

The condition under which a microwave oven heats up a food item containing water molecules most efficiently is:

The decreasing order of the wavelength of infrared, microwave, ultraviolet and gamma rays is:

The electric field part of an electromagnetic wave in a medium is represented by :

${\mathrm{E}}_{\mathrm{x}}=0;$
${\mathrm{E}}_{\mathrm{y}}=(2.\mathrm{5 }\frac{\mathrm{N}}{\mathrm{C}}\mathrm{)cos}\left[\left(2\mathrm{\pi }\times {10}^6\frac{\mathrm{rad}}{s}\right)\mathrm{t}\right]$ $-\left(\mathrm{\pi }\times {10}^{-2}\frac{\mathrm{rad}}{m}\right)\mathrm{x}$
${\mathrm{E}}_{\mathrm{z}}=0.$
$\mathrm{The}$ $\mathrm{wave}$ $\mathrm{is:}$

A parallel plate capacitor consists of two circular plates each of radius \(2~\text{cm}\), separated by a distance of \(0.1~\text{mm}\). If the voltage across the plates is varying at the rate of $\mathrm{}$\(5\times10^{13}~\text{V/s}\), then the value of displacement current is:
1. \(5.50~\text{A}\)
2. \(5.56\times 10^{2}~\text{A}\)
3. \(5.56\times 10^{3}~\text{A}\)
4. \(2.28\times 10^{4}~\text{A}\)