(a)        State two essential differences between a moving coil galvanometer and a d.c. generator.
(b)        Explain the term eddy currents and state two devices in which the currents are applied.
(c)        State the principle on which the potentiometer is based when it is functioning.
(d)       A source of e.m.f. 110 V and frequency 60Hz is connected to a resistor, an inductor and  a capacitor in series.  When the current in the capacitor is 2A, the potential differences across the resistor is 80 V and that across the inductor is 40 V.  Draw the vector diagram of the potential differences across the inductor, the capacitor and the resistor. 
Calculate the:
(i)         potential difference across the capacitor;
(ii)        capacitance of the capacitor;
(iii)       inductance of the inductor. [π = 3.14]