NCERT Exemplar Class 8 Science Chapter 15 Solutions: Some Natural Phenomena
NCERT Exemplar Class 8 Science Chapter 14 is introduced to give you information about the chemical effect of the electric current. In this chapter of NCERT Exemplar Class 8 Science, you will know about how the electric socket works. Before understanding the electric current, it is essential for you to know the difference between electric components. The chapter covers different topics like the heating effect of the electric current, magnetic effect of electric current, electromagnetic, electric bell, etc.
The chapter contains 3 sets of exercises from multiple-choice questions to long answer questions and 24 exemplar problems. All of these questions cover different topics of the chapter and check your understanding level if you are able to solve the questions. If you fail in doing so, the Instasolv team has the perfect online mentors who aim at providing you with the right solutions to all the problems of the NCERT Exemplar Solutions for Chapter 14. Instasolv has made dedicated efforts for a lot of years in order to create the best study material. This study material is going to help you in preparing for your CBSE exams as well as other competitive exams.
Important Topics Covered Under NCERT Exemplar Class 8 Science Chapter 14 – Chemical Effects of Electric Current
Symbols of Electric Components
There are some common electric components that are represented using symbols in the chapter you will know everything about the symbols and how they are represented. Like the electric cell, electric bulbs, batteries, wire all have different symbols. Some times in order to perform some activities you need more than one cell and you thus connect to or more cells together. When the positive terminal of one cell is connected to the negative terminal of the other cell, this combination is known as a battery.
Heating Effect of Electric Current
With the use of different activities, you will understand how the heating effect takes place. Whenever electric current passes through the wire if it gets hot, it is known as the heating effect of the electric current.
Some electric appliances like heater when used for cooking, it contains a coil of wire. Such a coil of wire is known as an element.
The wires that are made from some special material easily melt and break when a large number of electric currents are passed through them. Such wires are then used to make electric fuses.
It is the type of magnet in which the magnetic fuel produce with the use of an electric current. Electromagnets generally have a wire that is wounded into a coil.
Magnetic Effect of Electric Current
Also known as an electromagnetic effect, in a magnetic effect of electric current, it is observed that whenever a compass is brought near a conductor that carries current, the needle of the compass easily deflects. This is because of the flow of electricity. Thus, it shows that electric current is what produces a magnetic effect.
Exercise Wise Discussion of NCERT Exemplar Problems with Solutions Class 8 Science Chapter 14 – Chemical Effects of Electric Current
- In the exercise set 1 of multiple choice questions there are around 7 questions in which you have to choose the right option from the given 4 options in the question.
- You will be asked different questions like what solutions can not conduct electricity or how an electric current produces, etc.
- The very short answer question set consists of 4 questions with fill in the blanks and short answer questions.
- The third set of exercises consists of short answer questions in which there are around 6 questions. All these questions are diagram based and check what you have learned in the chapter.
- The fourth set is the long answer questions in which there is a total of 7 questions which is a mixture of simple answer questions or the diagram questions.
- In some questions, you will have to explain why a situation really happened or in the diagram questions, you will have to observe the differences that happened because of several other actions.
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