Electromagnetic...

The charge on a parallel plate capacitor varies as $$q = {q}_{0}cos2vt$$. The plates are very large and close together  (area = A, separation = d ) , the displacement current through the capacitor is

Two opposite charged particles oscillate about their mean equilibrium position in free space, with a frequency of $${10}^{9}Hz$$. The wavelength of the corresponding electromagnetic wave produced is ______

The rms value of the electric field of the light coming from sun is 720 N $$C^{-1}$$. The average total energy density of the electromagnetic wave is

An electromagnetic wave radiates outwards from a dipole antenna, with $${ E }_{ 0 }$$ as the amplitude of its electric field vector. The electric field $${ E }_{ 0 }$$ which transports significant energy from the source falls off as

One requires 11eV of energy to dissociate of carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in:

A parallel plate capacitor with circular plates of radius $$R$$ is being charged as shown. At the instant shown, the displacement current in the region between the plates enclosed between $$\cfrac{R}{2}$$ and $$R$$ is given by

A radiation of energy E falls normally on a perfectly reflecting surface. The momentum transferred to the surface is:

A plane polarized monochromatic $$EM$$ wave is traveling in vacuum along $$z$$ direction such that at $$t={t}_{1}$$ it is found that the electric field is zero at a spatial point $${z}_{1}$$. The next zero that occurs in its neighborhood is at $${z}_{2}$$. The frequency of the electromagnetic wave is:

The intensity of sun on earth is $$1400 W/m^2$$. Assuming earth to be a black body. Calculate radiation pressure?

The electric field associated with an e.m. wave in vacuum is given by $$\vec {E} = 40\cos (kz - 6\times 10^{8}t)\hat {i}$$, where $$E, z$$ and $$t$$ in $$volt/m$$, meter and seconds respectively. The value of wave vector $$k$$ is