Which of the following is incorrect for displacement current

A. Displacement current exists only when electric field changes with time

B. Displacement current obeys ohm's law

C. Displacement current produces magnetic field just like conduction current

D. Unlike conduction current, displacement current does not involve the flow of electrons through a conductor

A plane electromagnetic wave with frequency 40 MHz travels in free space. At a particular point in space and time, the magnetic field is $2 \times 10^{-8} T$. What will be the electric field at this point?

The electric and magnetic fields associated with an electromagnetic wave propagating along +z axis, can be represented by

Column - I lists the waves of the electromagnetic spectrum. Column - II gives approximate frequency range of these waves. Match Column - I and Column - II and choose the correct match from the given choices.

	Column I		Column II
(A)	Radiowaves	(P)	$$ 10^{18} \text { to } 10^{20} \mathrm{~Hz} $$
(B)	Microwaves	(P)	$$ 10^{11} \text { to } 5 \times 10^{14} \mathrm{~Hz} $$
(C)	Infrared	(R)	$$ 10^4 \text { to } 10^8 \mathrm{~Hz} $$
(D)	X-rays	(S)	$$ 10^9 \text { to } 10^{12} \mathrm{~Hz} $$