The existence of electromagnetic waves was experimentally confirmed by

If the rate of change of electric field across the plates of a parallel plate capacitor is $E$ and the displacement current is $I$,then the area of one plate of the capacitor is ($\varepsilon_{0}$ is permittivity of free space).

An accelerated electric charge emits

$A$ charged particle oscillates about its mean equilibrium position with a frequency of $8 \times 10^9 \text{ Hz}$. What is the frequency of the electromagnetic waves produced by the oscillator?

An accelerated electron produces ...

$A$ variable frequency $AC$ source is connected to a capacitor. How will the displacement current change with a decrease in frequency?