Solutions of Electricity (Page No- 47) - Physics By Lakhmir Singh, Class 10 Class 10 Notes | EduRev

Class 10 Physics Solutions By Lakhmir Singh & Manjit Kaur

Class 10 : Solutions of Electricity (Page No- 47) - Physics By Lakhmir Singh, Class 10 Class 10 Notes | EduRev

The document Solutions of Electricity (Page No- 47) - Physics By Lakhmir Singh, Class 10 Class 10 Notes | EduRev is a part of the Class 10 Course Class 10 Physics Solutions By Lakhmir Singh & Manjit Kaur.
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Lakhmir Singh Physics Class 10 Solutions Page No:47

Question 1:
Are the lights in your house wired in series ?
Solution :
No, they are wired in parallel.

Question 2:
What happens to the other bulbs in a series circuit if one bulb blows off ?
Solution :
All the other bulbs also stop glowing.

Question 3:
 What happens to the other bulbs in a parallel circuit if one bulb blows off ?

Solution :
All the other bulbs keep glowing.

Question 4:
Which type of circuit, series or parallel, is preferred while connecting a large number of bulbs :
 (a) for decorating a hotel building from outside ?
 (b) for lighting inside the rooms of the hotel ?

Solution :
(a) Series
(b) Parallel

Question 5:
Draw a circuit diagram to show how two 4 V electric lamps can be lit brightly from two 2 V cells.
Solution :
The two lamps (of 4V each) should be arranged in parallel with the two 2V cells.

Solutions of Electricity (Page No- 47) - Physics By Lakhmir Singh, Class 10 Class 10 Notes | EduRev

Question 6:
Why is a series arrangement not used for connecting domestic electrical appliances in a circuit ?
Solution :
A series arrangement is not used for connecting domestic electrical appliances in a circuit because if one electrical appliance stops working due to some defect, then all other appliance also stop working as the whole circuit is broken.

Question 7:
Give three reasons why different electrical appliances in a domestic circuit are connected in parallel.
Solution :
Different electrical appliances in a domestic circuit are connected in parallel because of the following advantages:
(i) If one electrical appliance stops working due to some defect, then all other appliances keep working properly.
(ii) Each electrical appliance has its own switch due to which it can be turned on or turned off independently, without affecting other appliances.
(iii) Each electrical appliance gets the same voltage as that of the power supply line.

Question 8:
Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a
 (a) parallel circuit to an identical power supply line.
 (b) Which circuit would have the highest voltage across each bulb ?
 (c) In which circuit would the bulbs be brighter ?
 (d) In which circuit, if one bulb blows out, all others will stop glowing ?
 (e) Which circuit would have less current in it ?

Solution :
(a) Parallel circuit
(b) Parallel circuit
(c) Series circuit
(d) Series circuit.

Question 9:
Consider the circuits given below :

Solutions of Electricity (Page No- 47) - Physics By Lakhmir Singh, Class 10 Class 10 Notes | EduRev
Solutions of Electricity (Page No- 47) - Physics By Lakhmir Singh, Class 10 Class 10 Notes | EduRev
Solutions of Electricity (Page No- 47) - Physics By Lakhmir Singh, Class 10 Class 10 Notes | EduRev

(a) In which circuit are the lamps dimmest ?
 (b) In which circuit or circuits are the lamps of equal brightness to the lamps in circuit (/) ?
 (c) Which circuit gives out the maximum light ?

Solution :
(a) circuit (ii)
(b) circuit (iii)
(c) circuit (iii)

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