Electromagnetic...

The concept of displacement current introduced by Maxwell removes asymmetry between  

A. Current flow inside the capacitor due to accumulation of charges on the capacitor walls is called displacement current.
B. Current due to the flow of electrons due to some potential difference is called as conduction current. 
C. Displacement current came into existence when Maxwell observed that if a magnetic compass is placed between the capacitors the needle gets deflected which signifies presence of magnetic fields which would possibly caused due to some changing current.
D. Displacement current change the actual motion of electric charges.
Which of the above statement(s) is/are correct?

According to Maxwell's hypothesis, changing of electric filed give rise to

Beyond which frequency, the ionosphere bands any incident electromagnetic radiation but do not reflect it back towards the earth?

If $${\epsilon}_0$$ and $${\mu}_0$$ represent the permittivity and permeability of vaccum and $$\epsilon$$ and $$\mu$$ represent the permittivity and permeability of medium, then refractive index of the medium is given by

Choose the correct answer from the alternatives given.
The amplitude of an electromagnetic wave in vaccum is doubled with no other changes made to the wave. As a result of this doubling of the amplitude, which of the following statement is correct?

Choose the correct answer from alternatives given.
If $$\vec { E } $$ and $$\vec { B } $$ represent electric and magnetic field vectors of an electromagnetic wave, the direction of propagation of the wave is along

According to Maxwell's equation, the velocity of light in any medium is expressed as

A plane electromagnetic wave travels in vacuum along $$\hat { k }$$ direction, where $$ \hat { i } ,\hat { j }$$ and $$ \hat { k } $$ are unit vectors along the $$x, y$$ and $$z$$ directions. The direction along which the electric and the magnetic field vectors point may be respectively

In Thomson's experiment to measure $${e}/{m}$$ of electron, the electric and the magnetic fields are