Students may better prepare for the Class 10 board exams by using the material provided in the NCERT Solutions Science. This knowledge is extremely crucial as it assists students in better comprehending difficult subject matter. Checking how well you understand a certain subject by reading the solutions to the questions asked in the textbook is a great way to figure out where your knowledge is strongest and where it needs improvement. Our subject matter specialists have designed these NCERT Solutions for Class 10 Science in such a manner that the students will have a much better understanding of all of the subjects that are included in the curriculum for CBSE Class 10 Science.
Students are able to create a strong conceptual basis with the help of the NCERT Solutions PDFs available at SWC. This base plays a key part in the students’ preparation for the latter phases of the competitive examinations. We give comprehensive answers to challenges posed by NCERT in accordance with the methodology provided by CBSE. The students are able to effortlessly prepare all of the ideas that are presented in their respective courses better and more successfully, and they are even able to succeed in passing the most difficult competitive examinations, such as JEE Main, JEE Advanced, NEET, AIMS, and so on.
Your academic journey begins a new stage as you reach the eighth grade, and a new facet of learning awaits you. This is the year where pupils begin to acquire an interest in the topic at hand, and it is also the year in which you choose whether you will study business, humanity, or science in the following year (class 12). As a consequence of this, having a solid foundation of knowledge in fields such as mathematics and physics comes highly recommended. The NCERT textbook for class 8 is the greatest book now available on the market for enhancing one’s education in the areas of mathematics and science. Read up on the theory that is presented in the book for grade 8 and answer all of the questions that are posed in the practice section of the NCERT textbook.
When working through the exercises in the NCERT textbook, if you run into any type of difficulty or uncertainty, you may use the swc NCERT Solutions for class 8 as a point of reference. While you are reading the theory form textbook, it is imperative that you always have notes prepared. You should make an effort to understand things from the very beginning so that you may create a solid foundation in the topic. Use the NCERT as your parent book to ensure that you have a strong foundation. After you have finished reading the theoretical section of the textbook, you should go to additional reference books.
NCERT SOLUTION FOR CLASS 8 SCIENCE CHAPTER 15 SOME NATURAL PHENOMENA – Exercises
Question 1. Identify the one which does not charge by friction that easily?
(i) An inflamed balloon
(ii) A woolen cloth
(iii) A plastic scale
(iv) A copper rod
Solution : (iv) Copper rod
The materials which are non-conducting in nature can be charged by friction easily. Copper which is a highly conducting material cannot be charged that easily.
Question 2. When a silk cloth is rubbed with a glass rod, the rod
(i) and the cloth acquires positive charge.
(ii)and the cloth acquires negative charge.
(iii)becomes positively charged while the cloth is negative charged.
(iv)becomes negatively charged while the cloth is positively charged.
Solution : (iii) the rod becomes positively charged while the cloth is negatively charged.
When two objects are rubbed against each other, they acquire opposite charges. By the law of convention it is known that the rod acquires the positive charge and the cloth is acquires the negative charge
Question 3. State whether the following statement is true or false.
(i) Like charges attract each other.
(ii)A charged glass rod attracts a charged plastic straw.
(iii)The Building cannot be protected from lighting by lighting conductor.
(iv)Prediction of earthquakes can be done in advance.
Unlike charges attract each other while the like charges repel each other.
A charged plastic straw has a negative charge on its surface while the glass rod has positive charges on its surface. Unlike charges attract each other so, they both attract each other.
When lighting occurs, the atmospheric charges are transferred to the earth directly by lightning conductor. Therefore the building is protected from lighting.
Even though the earthquake causes are known, there is no instruments that is invented to detect them in advance. Therefore earthquakes cannot be predicted in advance.
Question 4. Sometime, a crackling sound is heard while taking off a sweater during winters. Explain.
Solution : The cracking sound is heard because when the sweater is rubbed while taking it off, it acquires a small charge.
Question 5. Explain why a charged body loses its charge if we touch it with our hand.
Solution : Our body is a conductor of electricity. When we touch a charged body with our hand, the charged body loses charge to the earth through our body.
Question 6. Name the scale on which the destructive energy of earthquake is measured. An earthquake measures 3 on this scale. Would it be recorded by seismograph? Is it likely to cause much damage?
Solution : The destructive energy of an earthquake is measured on a scale called Richter scale. An earthquake measure 3 on this scale will be recorded by a seismograph. Whoever, it is not likely to cause much damage.
Question 7. Suggest three measures to protect ourselves from lightening.
(a) Hearing thunder, we should rush to a safer place like hours or building.
(b) If no proper shelter is available we and in open, never hide under a tree of electric pole.
(c) The telephone cord, electric wires and metal pipes should be avoided from touching.
Question 8. Explain why a charged balloon is repelled by another charged balloon whereas an uncharged balloon is attracted by another charged balloon?In first case, a charged balloon repels another charged balloon as both have like charges and like charges repel each other.
Solution : In second condition, an uncharged balloon gets attracted towards a charged balloon because the charged balloon induces opposite charge on it. This process of inducing charge on an uncharged body by bringing it close to a charged body is known as induction.
Question 9. Describe with the help of a diagram an instrument which can be used to detect a charged body.
Solution : A device that is used to test whether an object is carrying charge or not is known as electroscope.
Question 10. List three states in India where earthquakes are more likely to strike.
Solution : The three states in India where earthquakes are more likely to strike are Gujarat, Jammu & Kashmir and Assam.
Question 11. Suppose you are outside your home and an earthquake strikes. What precaution would you take to protect yourself?
Solution : Some precautions which can be taken when someone is outside and an earthquake strikes are:
(i) Try to find clear spot, away from buildings, trees and overhead power lines. Drop to the ground.
(ii) If travelling in a car or a bus, do not come out. Ask the driver to drive slowly to a clear spot and do not come out till the tremors stop.
Question 12. The weather department has predicted that a thunderstorm is likely to occur on a certain day. Suppose you have to go out on that day. Would you carry an umbrella? Explain.
Solution : No, I would not carry an umbrella with me if there is a prediction about a thunderstorm. The reason is, an umbrella has a metallic rod, which serves as a good conductor for lightning to reach human body thereby causing him an electric shock. Hence, we should not carry an umbrella during lightning.
Conclusions for NCERT SOLUTION FOR CLASS 8 SCIENCE CHAPTER 15 SOME NATURAL PHENOMENA
Lacking a solid understanding of scientific principles might have unimaginable repercussions. The NCERT textbook for class 8 science comes highly recommended from a number of different educators You will not only be able to improve your academic performance by using the appropriate combination of NCERT textbooks and NCERT answers for class 8 science chapter 15 but you will also be able to establish a strong foundation in science. The NCERT answers that were generated by the SWC team are among the finest solutions that are currently accessible on the web.