The direction of propagation of the electromagnetic wave is the same as that of (Here $\overrightarrow{E}$=electric field vector and $\overrightarrow{B}$=magnetic field vector):

(1) $\overrightarrow{E}\times \overrightarrow{B}$

(2) $\overrightarrow{B}\times \overrightarrow{E}$

(3) $\overrightarrow{E}$

(4) $\overrightarrow{B}$

The rate of change of the voltage of a parallel plate capacitor if the instantaneous displacement current of 1 A is established between the two plates of a 1 $\mu$F parallel plate capacitor:

(1) ${10}^6 V/s$                (2) 10 V/s

(3) ${10}^8 V/s$                (4) ${10}^{-6} V/s$

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

(1) $\frac{1}{2}.\frac{E^2}{{\epsilon }_0}+\frac{B^2}{2{\mu }_0}$                 (2) $\frac{1}{2}{\epsilon }_0{E}^2+\frac{1}{2}{\mu }_0{B}^2$

(3) $\frac{E^2+B^2}{C}$                           (4) $\frac{1}{2}{\epsilon }_0{E}^2+\frac{B^2}{2{\mu }_0}$

The relation between electric field E and magnetic field induction B in an electromagnetic waves

(1) $E=\sqrt{\frac{{\mu }_0}{{\epsilon }_0}} B$                     (2) E = cB

(3) E = $\frac{B}{c}$                                (4) $E=\frac{B}{c^2}$

Out of the following options which one can be used to produce a propagating electromagnetic wave?

1. A stationary charge               2. A chargeless particle

3. An accelerating charge          4. A charge moving at constant velocity

The velocity of electromagnetic radiation in a medium of permittivity ${\epsilon }_0$ and permeability ${\mu }_0$ is given by 

1. $\sqrt{\frac{{\epsilon }_o}{{\mu }_o}}$

2. $\sqrt{{\mu }_o{\epsilon }_o}$

3. $\frac{1}{\sqrt{{\mu }_o{\epsilon }_o}}$

4. $\sqrt{\frac{{\mu }_o}{{\epsilon }_o}}$

Which of the following statements about electromagnetic waves is/are correct:

(A) X-rays in vacuum travel faster than light waves in vacuum.

(B) The energy of an X-ray photon is greater than that of a light photon.

(C) Light can be polarised but X-ray cannot.

(1) A and B 

(2) B and C

(3) A, B and C

(4) B only

An electromagnetic wave going through the vacuum is described by $E=E_0\sin (kx-\omega t)$

Which is the following is/are independent of the wavelength?

(1) k            (2) $k/\omega$         (3) $k\omega$           (4) $\omega$

The energy of the EM wave is of the order of 15 KeV. To which part of the spectrum does it belong?

1. X-rays

2. Infrared rays

3. Ultraviolet rays

4. $\gamma$-rays