Q7 of 330 Page 47

Give three reasons why different electrical appliances in a domestic circuit are connected in parallel.

Due to the following advantages different electrical appliances in a domestic circuit are connected in parallel:

(i) Each electrical appliance gets the same voltage as that of the power supply line.


(ii) When appliances are connected in a parallel arrangement, each of them can be put on and off independently.


(iii) If one electrical appliance stops working due to some defect, then all other appliances keep working properly.


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5

Draw a circuit diagram to show two 4 V electric lamps can be lit brightly from two 2 V cells.

 6

Why is series arrangement not used for connecting domestic electrical appliances in a circuit?

 8

Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line.

(a) Which circuit would have the highest voltage across each bulb?


(b) In which circuit would the bulbs be brighter?


(c) In which circuit, if one bulb blows out, all others will stop glowing?


(d) Which circuit would have less current in it?

 9

Consider the circuits given below:


(a) In which circuit are the lamps dimmest?


(b) In which circuit or circuits are the maps or equal brightness to the lamps in circuit (i)?


(c) Which circuit gives out the maximum light?