(a)[2]
Explain why the supply voltage to the primary coil of a transformer has to be alternating.
(b(i))[2]
Calculate the number of turns in the secondary coil.
(b(ii))[2]
Calculate the current in the primary circuit.
(b(iii))[1]
Calculate the maximum number of lamps, identical to the lamp in (ii), that may be connected in parallel in the secondary circuit without blowing the fuse.