$A$ 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?

The electric field through an area of $2 \ m^2$ varies with time as shown in the graph. The greatest displacement current through the area is at $t = ..... \ \mu s$.

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

The capacitance of a capacitor is $2 \ pF$. If the electric field inside the capacitor changes at a rate of $10^{12} \ V \ s^{-1}$,the displacement current is ..... $A$.

What are Maxwell's equations? Write these equations.

Seawater at a frequency $f = 9 \times 10^{2} \, Hz$ has permittivity $\varepsilon = 80 \varepsilon_{0}$ and resistivity $\rho = 0.25 \, \Omega m$. Imagine a parallel plate capacitor is immersed in seawater and is driven by an alternating voltage source $V(t) = V_{0} \sin(2 \pi ft)$. Then the conduction current density becomes $10^{x}$ times the displacement current density after time $t = \frac{1}{800} \, s$. The value of $x$ is ......... . $\left(\frac{1}{4 \pi \varepsilon_{0}} = 9 \times 10^{9} \, Nm^{2} C^{-2}\right)$