Which scientist first time produced electromagnetic waves in laboratory?

Show that the magnetic field $B$ at a point in between the plates of a parallel-plate capacitor during charging is $B = \frac{{\mu _0 \epsilon _0 r}}{2} \cdot \frac{{dE}}{{dt}}$ (symbols have their usual meanings).

Electromagnetic waves can be produced by . . . . . . .

What are Maxwell's equations? Write these equations.

What is the phase difference between the space current and the capacitive displacement current produced when radio waves pass through the ionosphere?

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 ..... $A$.