The diagram in figure shows three lamps and three switches 1, 2 and 3 connected with two cells.
(a) Name the switch/switches to be closed so as to light all three lamps.
(b) How are then the lamps connected : in series or in parallel.
(a) In order to light all the three lamps switch 2 and 3 should be closed.
(b) The lamps are then connected in series.
