Electromagnetic Induction

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