Who discovered for the first time that a changing electric field can produce a magnetic field?

$A$ parallel plate capacitor consists of two circular plates each of radius $2 \,cm$, separated by a distance of $0.1 \,mm$. If the potential difference across the plates is varying at the rate of $5 \times 10^6 \,Vs^{-1}$, then the value of displacement current is

$A$ displacement current of $4.0 \text{ A}$ can be set up in the space between two parallel plates of a $6 \text{ }\mu\text{F}$ capacitor. The rate of change of potential difference across the plates of the capacitor is nearly $\alpha \times 10^6 \text{ V/s}$. The value of $\alpha$ is . . . . . . .

According to Maxwell's hypothesis,a changing electric field gives rise to

Assertion : Dipole oscillations produce electromagnetic waves.
Reason : Accelerated charge produces electromagnetic waves.

At a particular instant,the current in the circuit given below is $i$. The displacement current between the plates of the capacitor shown below is ..........