Electromagnetic Induction

goals
Which of the following is not an application of eddy currents.
Switches $S_1, S_2$ and $S_3$ remain open for long time such that capacitor becomes fully charged and
current in inductor coil becomes maximum. Now switches $S_1, S_2$ and $S_3$ are simultaneously closed at $t = 0.$ Assume that battery and inductor coil are ideal.
On what principle $AC$ generator works?
In an L-R series A.C. circuit the potential difference across an inductance and resistance joined in series are respectively $12$$V and 16$$V$. Find the total potential difference across the circuit.
In faraday's experiment current in not produced in