The diagram in Fig. 9.28 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 the three lamps.

(b) How are then the lamps connected : in series or in parallel ?

Fig ; 9.28

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Solution

(a) Switches 2 and 3.

(b) The lamps are connected in series.

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Similar questions

Fig. 9.29 below shows two bulbs with switches and fuse connected to the mains through a three pin socket by means of a three wires cable.

Fig. 9.29

(a) Label each component - bulb, switch, fuse and socket.

(b) Name and state the colour of insulation of each wire 1, 2 and 3.

(a) Draw a circuit diagram showing two lamps, one cell and a switch connected in series.
(b) How can you change the brightness of the lamps?

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