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. $\frac{1}{2}\frac{q}{B^2}$

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:

A larger parallel plate capacitor, whose plates have an area of 1 $m^2$, separated from each other by 1 mm, is being charged at a rate of 25.8 V/s. If the plates have dielectric constant 10, then the displacement current at this instant is:

1. 25 $\mu A$

2. 11 $\mu A$

3. 2.2 $\mu A$

4. 1.1 $\mu A$

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 $V{m}^{-1}$. The magnetic induction is:

1. $3.1\times {10}^{-8}$ $T$

2. $3\times {10}^{-5}$ $T$

3. $3\times {10}^{-6}$ $T$

4. $9.3\times {10}^{-6}$ $T$

Light is a kind of wave. The wavelength of visible light ranges from about 4000 \(\overset{o}{A}\) to 7000 \(\overset{o}{A}\). Which of the following statements is false?

If a source is transmitting an electromagnetic wave of frequency $8.2\times {10}^6$ $Hz$, then the wavelength of the electromagnetic wave transmitted from the source will be: