NCERT Solutions Class 6 Science Chapter 12

NCERT Solutions for Class 6 Science Chapter 12

NCERT Class 6 Science Chapter 12 covers the topics of electricity and circuits in detail. It explains the concepts of different electrical devices, electrical circuits, switches, conductors, insulators etc. There are practise questions at the end to help students revise the concepts learned and gauge their understanding of the chapter at the same time.

The NCERT Solutions for Class 6 Science Chapter 12 are a comprehensive and accurate guide to the exercise questions of the NCERT textbook. Referring to these NCERT Solutions will help students in preparing for exams more effectively.

NCERT Class 6 Science Other Chapters Solutions

NCERT Solutions for Class 6 Science Chapter 12 Topic-Wise Discussion

The NCERT Class 6 Science Chapter 12 starts with an introduction to electricity and circuits in general. It discusses the importance of electricity in our daily lives and mentions some devices that rely on it to function.

There are a total of five subsections in Chapter 12. They are discussed topic-wise in detail as follows: 

Electric Cell

The chapter explains the concept of the electric cell while covering the functionality of different types of electric cells, their architecture and the hazard sign on them.

The working principle of these cells is explained through various experiments. There are even two DIY activities that you can perform at your home to understand it. The first one includes understanding the architecture of a torch bulb which you can understand by taking out a bulb and studying all its different parts. 

Bulb Connected to an Electric Cell

The following section on electricity and circuits Class 6 will teach you how to light a torch bulb using an electric cell. It will provide a step-by-step guide on how to execute this process without any difficulty. 

For this purpose, students have to take two electric wires of different colours and bring out their metal cores by cutting off their plastic covering. After that, they will have to join one end of the exposed metal portion with the cell and the other with the bulb. For sticking them, students can use the tape that is generally used by electricians for doing so. Students can then experiment by interchanging the wires and note down the results to discuss their observations later. 

Electric Circuit

As suggested by the name of the chapter, it presents a detailed explanation of electrical circuits. Taking a cue from the earlier experiment, students must be clear on the basics of an electrical circuit when they light a torch bulb by the use of an electrical cell.

In the earlier experiment, an electrical circuit was created by joining an electrical cell with a torch bulb. This led to the creation of a path where the electricity could pass between two terminals of electric cells. Likewise, this section of the chapter also provides a DIY project that students can perform to improve their understanding of the fundamentals of an electrical circuit.

Electric Switch

As the name suggests, this section discusses the concept of an electric switch. Electric switches are essential in an electrical circuit because they control the flow of electricity in an electrical circuit.

Students can perform an activity mentioned in the section to understand the electrical switches in a better way. The activity includes the use of paper clips, wooden boards, safety pins, and other household materials to create a circuit and an electrical switch.

Electric Conductors and Insulators

This section discusses various conductors and insulators. It also discusses the different types of objects and their electricity transportation ability. Insulators, their function, and their importance in electrical circuits are also discussed in the section. 

Reasons to Study NCERT Solutions

NCERT Solutions for Class 6 Science Chapter 12 provided by Extramarks will help the students in their exam preparation in the following ways:

  • Subject matter experts at Extramarks have prepared the solutions as per the latest guidelines by CBSE.
  • The solutions are accurate and written in simple language.
  • The solutions can be used for last-minute revision.

Q.1 Fill in the blanks:

(a) A device that is used to break an electric circuit is called _____.

(b) An electric cell has _____ terminals.

Ans-

(a) A device that is used to break an electric circuit is called a switch.

(b) An electric cell has two terminals.

Q.2 Mark ‘True’ or ‘False’ for the following statements:

(a) Electric current can flow 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 thermo Col.

Ans-

(a) Electric current can flow through metals. (True)

Explanation: Electric current can pass through metals as they allow an electric current to flow through them easily.

(b) Instead of metal wires, a jute string can be used to make a circuit. (False)

Explanation: Jute string is an insulator. Hence, electric current cannot pass through it.

(c) Electric current can pass through a sheet of thermo Col. (False)

Explanation: Thermo Col is also an insulator. Hence, electric current cannot pass through it.

Q.3 Explain why the bulb would not glow in the arrangement shown in Fig.12.13.

Ans-

In the given circuit, a tester holder is connected in series. Electric current cannot pass through tester holders because it is a bad conductor of electricity. Hence, the current will not flow through the circuit and hence, the bulb will not glow.

Q.4 Complete the drawing shown in Fig 12.14 to indicate where the free ends of the two wires should be joined to make the bulb glow.

Ans-

In order to complete the circuit, the positive terminal of the cell should be connected to one end of the bulb, and the other terminal of the bulb should be connected to the other end of the bulb. It can be shown in the figure.

Q.5 What is the purpose of using an electric switch? Name some electrical gadgets that have switches built into them.

Ans-

A switch is used to complete or break an electric circuit. If the switch is ‘ON’, then current will flow through the circuit. On the other hand, if the switch is ‘OFF’, then current will not flow through the circuit. Electric fans, electric lamps, washing machines, juicers and mixers, etc. have switches built into them.

Q.6 Would the bulb glow after completing the circuit shown in Fig. 12.14, if we use an eraser instead of a safety pin?

Ans-

No. The bulb will not glow if we connect an eraser in the circuit. It is because erasers are bad conductor of electricity. They do not conduct electricity. The circuit becomes an open circuit.

Q.7 Would the bulb glow in the circuit shown in Fig. 12.15?

Ans-

No. The bulb will not glow because the two terminals of the cell are connected to the single terminal of the bulb. In order to complete the circuit, the two terminals of the cell should be connected to the two terminals of the bulb.

Q.8 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.

Ans-

The bulb of the conduction tester glows when the tester is touched with the object. It shows that the given object conducts electricity. Hence, the object is a conductor in nature.

Q.9 Why should an electrician use rubber gloves while repairing an electric switch at your home? Explain.

Ans-

An electric switch conducts electricity through its internal parts and one may get an electric shock if it is touched with naked hands. Hence, it should be touched with rubber gloves in hand because rubber cannot conduct electricity.

Q.10 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?

Ans-

Plastics and rubbers are the bad conductor of electricity. So, handle of tools such as screwdrivers, pliers, etc. which are used by electricians to repair electrical appliances usually have plastic or rubber cover on them.

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FAQs (Frequently Asked Questions)

Electric switches are used to complete or break an electrical circuit. Refrigerators, fans, microwave ovens, and electric cookers are some electrical gadgets that have inbuilt switches in them. 

Solutions to 10 questions are included in the NCERT Solutions of Class 6 Science Chapter 12. It also contains short question answers and some fill-in-the-blank questions that you can go through for practice. In case you are unable to answer the textbook questions correctly, you can access the solutions and clear your queries from these solutions. 

All the fundamental concepts of the chapter highlighted in the solutions are to prepare you to face the changes that may occur in the industries. It has been prepared in an interactive way for your problem-solving.

For setting up an electric current, an energy source like a battery is needed. Such a battery must produce a voltage (when the switch of the electrical circuit is switched on) so there can be a movement of electrons in the proper direction. There’s a switch in the circuit. When the switch is turned on, the electrons flow in a single direction. The force acting on electrons is known as electromotive force and the quantity is a voltage, measured in volts.