NCERT Solutions for Class 6 Science Chapter 9 Electricity and Circuits
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Page 1
NCERT
SOLUTIONS
CLASS - 6TH
aglase .co
SOLUTIONS
CLASS - 6TH
aglase .co
Page 2
Book : Science NCERT Solutions | Chapter - 12 Science
Class : 6th
Subject : Science
Chapter : 12
Chapter Name : ELECTRICITY AND CIRCUITS
Q1 Fill in the blanks :
(a) A device that is used to break an electric circuit is called _______________.
(b) An electric cell has _______________ terminals.
Answer. (a) A device that is used to break an electric circuit is called a switch.
Switch:
A switch is an electric device that is used to break a circuit. When the switch is in 'OFF'
position, then the circuit is not complete. Then, the circuit is called an open circuit. An
electric current cannot �ow through this circuit.
(b) An electric cell has two terminals.
Two terminals:
An electric cell has two terminals, a negative terminal and a positive terminal (as shown
in the given �gure).
Page : 123 , Block Name : Exercise
Q2 Mark 'True' or 'False' for following statements:
(a) Electric current can �ow through metals.
(b) Instead of metal wires, a jute string can be used to make a circuit.
(c) Electric current can pass through a sheet of thermocol.
Answer. (a) True
Metals are good conductors of electricity. They allow an electric current to �ow through
them easily. Hence, an electric current can �ow through metals.
(b) False
Jute string is a bad conductor of electricity. If jute string is used to make an electric
circuit, then the current will not �ow through it. Hence, strings made of jute cannot be
used to make circuits.
Page 1 of 4 Aglasem Schools
Class : 6th
Subject : Science
Chapter : 12
Chapter Name : ELECTRICITY AND CIRCUITS
Q1 Fill in the blanks :
(a) A device that is used to break an electric circuit is called _______________.
(b) An electric cell has _______________ terminals.
Answer. (a) A device that is used to break an electric circuit is called a switch.
Switch:
A switch is an electric device that is used to break a circuit. When the switch is in 'OFF'
position, then the circuit is not complete. Then, the circuit is called an open circuit. An
electric current cannot �ow through this circuit.
(b) An electric cell has two terminals.
Two terminals:
An electric cell has two terminals, a negative terminal and a positive terminal (as shown
in the given �gure).
Page : 123 , Block Name : Exercise
Q2 Mark 'True' or 'False' for following statements:
(a) Electric current can �ow through metals.
(b) Instead of metal wires, a jute string can be used to make a circuit.
(c) Electric current can pass through a sheet of thermocol.
Answer. (a) True
Metals are good conductors of electricity. They allow an electric current to �ow through
them easily. Hence, an electric current can �ow through metals.
(b) False
Jute string is a bad conductor of electricity. If jute string is used to make an electric
circuit, then the current will not �ow through it. Hence, strings made of jute cannot be
used to make circuits.
Page 1 of 4 Aglasem Schools
Page 3
Book : Science NCERT Solutions | Chapter - 12 Science
(c) False
Thermocol is a bad conductor of electricity. Hence, electric current cannot pass through
it.
Page : 123 , Block Name : Exercise
Q3 Explain why the bulb would not glow in the arrangement shown in Fig.
Answer. An electric current cannot pass through objects such as plastic scales, tester
holders, etc., because these objects are bad conductors of electricity.
From the given �gure, it can be observed that one terminal of the bulb is connected to a
tester holder. A current will not �ow through the circuit. Hence, the bulb would not glow.
Page : 123 , Block Name : Exercise
Q4 Complete the drawing shown in Fig to indicate where the free ends of the two wires
should be joined to make the bulb glow.
Answer. The given circuit is not complete. To complete the circuit, the positive terminal
of the cell should be connected to one end of the switch, and the other terminal of the
bulb should be connected to the other end of the switch. The closed circuit is shown in
the following �gure:
Q5 What is the purpose of using an electric switch? Name some electrical gadgets that
Page 2 of 4 Aglasem Schools
(c) False
Thermocol is a bad conductor of electricity. Hence, electric current cannot pass through
it.
Page : 123 , Block Name : Exercise
Q3 Explain why the bulb would not glow in the arrangement shown in Fig.
Answer. An electric current cannot pass through objects such as plastic scales, tester
holders, etc., because these objects are bad conductors of electricity.
From the given �gure, it can be observed that one terminal of the bulb is connected to a
tester holder. A current will not �ow through the circuit. Hence, the bulb would not glow.
Page : 123 , Block Name : Exercise
Q4 Complete the drawing shown in Fig to indicate where the free ends of the two wires
should be joined to make the bulb glow.
Answer. The given circuit is not complete. To complete the circuit, the positive terminal
of the cell should be connected to one end of the switch, and the other terminal of the
bulb should be connected to the other end of the switch. The closed circuit is shown in
the following �gure:
Q5 What is the purpose of using an electric switch? Name some electrical gadgets that
Page 2 of 4 Aglasem Schools
Page 4
Book : Science NCERT Solutions | Chapter - 12 Science
have switches built into them.
Answer. A switch is an electric device that is used to complete or break an electric circuit.
If the switch is 'ON', then a current can �ow through the circuit. However, if the switch is
'OFF', then the current cannot �ow through the circuit. Electrical appliances such as
table fans, electric lamps, washing machines, juicers and mixers, TV, radio, etc. have
switches built into them.
Q6 Would the bulb glow after completing the circuit shown in Fig. if instead of safety pin
we use an eraser?
Answer. Erasers are bad conductors of electricity. They do not conduct electricity. The
circuit becomes an open circuit. Hence, the bulb will not glow if a safety pin is replaced
with an eraser.
Q7 Would the bulb glow in the circuit shown in Fig.?
Answer. The bulb will not glow. This is because the two terminals of the cell are
connected to the single terminal of the bulb. This is equivalent to the bulb not being
connected in the circuit at all. The two terminals of the battery should be connected to
the two terminals of the cell.
Page 3 of 4 Aglasem Schools
have switches built into them.
Answer. A switch is an electric device that is used to complete or break an electric circuit.
If the switch is 'ON', then a current can �ow through the circuit. However, if the switch is
'OFF', then the current cannot �ow through the circuit. Electrical appliances such as
table fans, electric lamps, washing machines, juicers and mixers, TV, radio, etc. have
switches built into them.
Q6 Would the bulb glow after completing the circuit shown in Fig. if instead of safety pin
we use an eraser?
Answer. Erasers are bad conductors of electricity. They do not conduct electricity. The
circuit becomes an open circuit. Hence, the bulb will not glow if a safety pin is replaced
with an eraser.
Q7 Would the bulb glow in the circuit shown in Fig.?
Answer. The bulb will not glow. This is because the two terminals of the cell are
connected to the single terminal of the bulb. This is equivalent to the bulb not being
connected in the circuit at all. The two terminals of the battery should be connected to
the two terminals of the cell.
Page 3 of 4 Aglasem Schools
Page 5
Book : Science NCERT Solutions | Chapter - 12 Science
Q8 Using the "conduction tester" on an object it was found that the bulb begins to glow.
Is that object a conductor or an insulator? Explain.
Answer. When the two free ends of a conductor tester are touched with an object, then
the bulb of the tester would glow if the object conducts electricity. However, the bulb
would not glow if the object does not conduct electricity. Since the bulb glows when the
tester is touched with the object, the object must conduct electricity. Hence, the object is
a conductor.
Q9 Why should an electrician use rubber gloves while repairing an electric switch at your
home? Explain.
Answer. An electric switch is an electrical appliance. It conducts electricity through its
internal parts. When its internal parts are touched with naked hands, then it may cause
an electric shock. Therefore, it should be touched with rubber gloves in hand because
rubber cannot conduct electricity. Hence, electricians wear rubber gloves while repairing
a switch or any other electrical appliance.
Q10 The handles of the tools like screwdrivers and pliers used by electricians for repair
work usually have plastic or rubber covers on them. Can you explain why?
Answer. Rubber is a bad conductor of electricity. It does not allow current to �ow
through it. Hence, handles of tools such as screwdrivers, pliers, etc. which are used by
electricians for repair work usually have plastic or rubber cover on them. This protects
them from electric shocks.
Page 4 of 4 Aglasem Schools
Q8 Using the "conduction tester" on an object it was found that the bulb begins to glow.
Is that object a conductor or an insulator? Explain.
Answer. When the two free ends of a conductor tester are touched with an object, then
the bulb of the tester would glow if the object conducts electricity. However, the bulb
would not glow if the object does not conduct electricity. Since the bulb glows when the
tester is touched with the object, the object must conduct electricity. Hence, the object is
a conductor.
Q9 Why should an electrician use rubber gloves while repairing an electric switch at your
home? Explain.
Answer. An electric switch is an electrical appliance. It conducts electricity through its
internal parts. When its internal parts are touched with naked hands, then it may cause
an electric shock. Therefore, it should be touched with rubber gloves in hand because
rubber cannot conduct electricity. Hence, electricians wear rubber gloves while repairing
a switch or any other electrical appliance.
Q10 The handles of the tools like screwdrivers and pliers used by electricians for repair
work usually have plastic or rubber covers on them. Can you explain why?
Answer. Rubber is a bad conductor of electricity. It does not allow current to �ow
through it. Hence, handles of tools such as screwdrivers, pliers, etc. which are used by
electricians for repair work usually have plastic or rubber cover on them. This protects
them from electric shocks.
Page 4 of 4 Aglasem Schools
Document Details
| Board / Org | NCERT |
| Exam | Class 6 |
| Type | Solution |
| Pages | 5 |
| Updated | 22 Jul 2026 |