The S.I. unit of displacement current is:
1. Henry
2. Coulomb
3. Ampere
4. Farad

Instantaneous displacement current of $2.0~\text A$ is set up in the space between two parallel plates of $1~\mu \text{F}$ capacitor. The rate of change in potential difference across the capacitor is:
1. $3\times 10^{6}~\text{V/s}$
2. $4\times 10^{6}~\text{V/s}$
3. $2\times 10^{6}~\text{V/s}$
4. None of these

In an electric circuit, there is a capacitor of reactance $100~\Omega$ connected across the source of $220~\text{V}$. The rms value of displacement current will be:
1. $2.2~\text{A}$
2. $0.22~\text{A}$
3. $4.2~\text{A}$
4. $2.4~\text{A}$

A variable frequency AC source is connected to a capacitor. Then on increasing the frequency:

The charge of a parallel plate capacitor is varying as; $q = q_{0} \sin\omega t$. The magnitude of displacement current through the capacitor is:
(the plate Area = $A$, separation of plates = $d$)
1. $q_{0}\cos \left(\omega t \right)$
2. $q_{0} \omega \sin\omega t$
3. $q_{0} \omega \cos \omega t$
4. $\frac{q_{0} A \omega}{d} \cos \omega t$

A parallel plate capacitor with plate area $A$ and separation between the plates $d$, is charged by a source having current $i$ at some instant. Consider a plane surface of area $A/2$ parallel to the plates and drawn symmetrically between the plates. The displacement current through this area is:
1. $i$ 
2. $\dfrac{i}{2}$ 
3. $\dfrac{i}{4}$ 
4. $\dfrac{i}{8}$

A capacitor is made of two circular plates each of radius $12~\text{cm}$ and separated by $5.0~\text{cm}.$ The capacitor being charged by an external source. The charging current is constant and equal to $0.15~\text{A}.$ The displacement current across the plates is:
1. $0$
2. $0.14~\text{A}$
3. $0.16~\text{A}$
4. $0.15~\text{A}$

A larger parallel plate capacitor, whose plates have an area of $1~\text{m}^2,$ separated from each other by $1~\text{mm},$ is being charged at a rate of $25.8~\text{V/s}.$ If the plates have a dielectric constant $10,$ then the displacement current at this instant is:
1. $25~\mu\text{A}$
2. $11~\mu\text{A}$
3. $2.2~\mu\text{A}$
4. $1.1~\mu\text{A}$

A parallel plate capacitor consists of two circular plates each of radius $2~\text{cm}$, separated by a distance of $0.1~\text{mm}$. If the voltage across the plates is varying at the rate of $5\times10^{13}~\text{V/s}$, then the value of displacement current is:
1. $5.50~\text{A}$
2. $5.56\times 10^{2}~\text{A}$
3. $5.56\times 10^{3}~\text{A}$
4. $2.28\times 10^{4}~\text{A}$