We have Provided Water: A Precious Resource Class 7 Science MCQs Questions with Answers to help students understand the … Then anyhow, he managed to get his mobile in his hand and with the help of its light, he went outside of his room to check if there was any problem in the electric circuit board of his house. / By Prasanna. Yes, electric current have other effect except heating, i.e. [NCERT Exemplar; HOTS] You can refer to NCERT Solutions for Class 7 Science Chapter 14 Electric Current and Its Effects to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. (b) (ii) and (iii) are correct, Question 7. Why do we cover plug pinholes which are within the reach of children with cellotape or a plastic cover when not in use? Access Answers of NCERT Solutions for Class 7 Science Chapter 14 Electric Current and its effects. Mention the name of the two devices that work on the basis of magnetic effects of current. The hammer strikes the gong every time the circuit is completed. (d)-(iii) Answer: NCERT Solutions for Class 7 Science Chapter 12 Reproduction in Plants in English Medium and अध्याय 12 पादप में जनन in हिंदी मीडियम free PDF file download or view online updated for academic session 2020-21 based on new NCERT Books. (a) Will the heat produced in both the cases be equal? Miniature Circuit Breaker. 4. battery Give one reason to justify your answer. Free PDF download of Important Questions with solutions for CBSE Class 7 Science Chapter 15 - Light prepared by expert Science teachers from latest edition of CBSE(NCERT) books. 6. Question 2. The coil acts as an electromagnet. Answer: (ii) circuit is open (a) DCB This is how the bell rings. (c) MCB Nutrition in Plants. (b) The values showed by Pinki here is a great concern and love towards her own 4 years old daughter. Chapter 1 Nutrition in Plants. That is why the electromagnets are better than the permanent magnets. (a) All are correct The current flowing in both the circuits is the same. The electromagnet attracts the iron armature towards itself. There is a contact screw near the iron strip. NCERT Solutions for Science Class 7 have been created and compiled by some of the experts and professional teachers in the field making them a highly credible source for Class 7 Science. (b) There is a maximum limit on the current which can safely flow through the electric circuits If unconsciously, a child puts his finger in the electric socket, the shock may be fatal. Batteries used in tractors, trucks and inverters are also made from cells. A piece of wire is connected to each of the two metal clips on the cells holder. NCERT Solutions Class 7 Science Chapter 14 Electric Current and its Effects September 25, 2019 by Sastry CBSE Topics and Sub Topics in Class 7 Science Chapter 14 Electric Current and its Effects: Answer: (a) only single cell When an electric current flows through a wire, it behaves like a magnet. (b) Aluminium While playing, the electricity of his house went off due to which he could not able to see anything around him. Due to this, the electric circuit breaks and no current flows in the electromagnet coil. Answer: In an electric circuit, a fuse is a ………………, ……………… to prevent possible fire. Answer: (a) lesser (d) (i) and (ii) are correct Answer: Fibre to Fabric Class 7 Extra Questions and Answers Science Chapter 3 PDF are solved by experts and will guide students in the right direction. Students are advised to practice the NCERT MCQ Questions for Class 7 Science Chapter 14 Electric Current and Its Effects with Answers Pdf free download is available here. NCERT solutions for Class 7 Science have been provided below to aid the students with answering the questions correctly, using a logical approach and methodology. As we know that a battery is a combination of two or more cells and it can be constructed by placing cells property on cell holder in such a way that the positive terminal of one cell is connected to the negative terminal of other. At the same time, she listened the voice of her 4 years old daughter from the same room where she was ironing the clothes. Students can get how to tackle different questions easily by solving the Extra Questions for Class 7 Science Question bank on a regular basis. (b) Mention the values showed by Pinki here. (d) same A fuse is used to save energy in the electric circuits. Compact Fluorescent Lamp. So, this process of ‘make and break’ of the electric circuit continues as long as we are pressing the switch. (b) No, the amount of heat produced in the wire of same length but different thickness cannot be same because amount of heat produced in a wire also depends on the thickness of the wire. When the current through the coil stops flowing, the coil does not remain an electromagnet. NCERT Solutions Class 7 Science Chapter 7 Weather, Climate And Adaptations Of Animals To Climate. Answer: Question 5. Question 3. Multiple Choice Questions Answer: At the same time, his father suggested him to maintain the distance from the circuit board and decided to call some electrician to check the problem. Free PDF download of Important Questions for CBSE Class 7 Science prepared by expert teachers from the latest edition of CBSE (NCERT) books. MCQ Questions for Class 7 Science with Answers were prepared based on the latest exam pattern. Explain why. The coil is now no longer an electromagnet. 4. Give the name any two electrical appliances in which electromagnets are used. Answer: Answer: 3. (d) None of the above As, Paheli’s coil has more number of turns than Boojho. Extra Questions for Class 7 Science Chapter 14 Electric Current and Its Effects with Answers. This completes the circuit. (ii) Another reason for excessive current can be the connection of many devices to a single socket. Answer: [NCERT Exemplar; HOTS] Question 4. The coil of wire contained in heater is known as In this lesson, students will learn about nutrients, mode of nutrition in … Answer: NCERT Solutions for Class 12 Hindi Vitan Chapter 4 डायरी के पन्ने, NCERT Solutions for Class 12 Hindi Vitan Chapter 3 अतीत में दबे पाँव, NCERT Solutions for Class 12 Hindi Vitan Chapter 2 जूझ, NCERT Solutions for Class 12 Hindi Vitan Chapter 1 सिल्वर वैडिंग, NCERT Solutions for Class 12 Hindi Aroh Chapter 18 श्रम-विभाजन और जाति-प्रथा, मेरी कल्पना का आदर्श समाज, NCERT Solutions for Class 12 Hindi Aroh Chapter 17 शिरीष के फूल, NCERT Solutions for Class 12 Hindi Aroh Chapter 16 नमक, NCERT Solutions for Class 12 Hindi Aroh Chapter 15 चार्ली चैप्लिन यानी हम सब, NCERT Solutions for Class 12 Hindi Aroh Chapter 14 पहलवान की ढोलक, NCERT Solutions for Class 12 Hindi Aroh Chapter 13 काले मेघा पानी दे, NCERT Solutions for Class 12 Hindi Aroh Chapter 12 बाज़ार दर्शन. As if high amount of current is passed, it melts to disconnect the electric circuit and prevent us from causing any damage. (d) Steel Choose the combination of correct answer from the following. Class 7 Science MCQs Questions with Answers Chapter Wise PDF Download. Question 14. So, as the armature moves towards the poles of the electromagnet, the clapper attached to it strikes the gong and produces a ringing sound. Would the bulb still glow? (a) When live and neutral wire touches each other directly then it leads to short circuit in which the large amount of current flows through the household wiring and this large current may heat the wires to a dangerously high temperature and a fire may be started. If we connect more cells in the circuit, then what will happen? Answer: (b) component It is overloaded by connecting too many devices to it. Answer: Question 2. These MCQ Questions on Motion and Time Class 7 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. Students can get how to tackle different questions easily by solving the Extra Questions for Class 7 Science Question bank on a regular basis. Answer: The core of an electromagnet is made from ……………… . (a) circuit (a) A magnetic device used for finding geographic directions, (b) A device which is essential in an electric bell, (c) A fuse used in expensive and sensitive electric devices, (d) An alloy used as a material of fuse wir, (e) A material used for making filament of a bulb, (f) A material which does not allow the electric current to pass, (g)A material used for making electromagnets. Stay connected to our site to avail latest updates on Extra Questions for Various Classes instantly. Has she taken the right step? An electric cell produces electricity from the ……………… in it. Question 18. When too many devices get connected, then a circuit is said to be overloaded. Briefly mention which part of the symbol of battery shows positive and negative terminals? (iii) no current flows through it Match the statements in Column I with those in Column II. Difference between an open circuit and a closed circuit. (d) element Answer: 1. When an electric current is passed through a coil, it gets magnetised due to phenomena of magnetic effect of current. NCERT Solutions for Class 7 Science CBSE, 10 Respiration in Organisms. It implies that the bell rings. No, we cannot use same fuse in a geyser and in a television set because the fuse used in every appliances has some limit to withstand the current flows through it. Paheli took a wire of length 10 cm. Answer: The nails attract the pins. What is the full form of MCB? Question 4. (i) The basic unit of time is second. (b) Pulkit’s father seems very sensible in taking the decisions and he showed a very great concern towards his son. (d) We should never turn the switch in ON position, Question 6. Question 4. NCERT Exemplar Class 7 Science is very important resource for students preparing for VII Board Examination.Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 7. Question 4. [NCERT Exemplar] Question 5. Practicing these NCERT Science MCQs for Class 7 CBSE with Answers Pdf will guide students to do a quick revision for all the concepts present in each chapter and prepare for final exams. Question 4. (a) Due to the low resistance and strength of aluminium and coppers, both these metals are usually employed for the transmission of electricity. Electric fuse is based on the magnetic effect of electric current. False, as the element of an electric bulb is made of tungsten. magnetic effect of current. (e)-(v) When the switch is in the ‘ON’ position, the circuit from the positive terminal of the battery to the negative terminal is complete. Answer: 7. CFLs consume more electricity than an ordinary bulb. [NCERT Exemplar] Discuss the reason for excessive currents in electrical circuits. Explain, why. Answer: Our free NCERT textbook solutions for CBSE Class 7 Science will strengthen your fundamentals and can help you … Answer: This process is repeated in quick succession. Thus, the circuit is saved. When electric current is passed through a coil, there is a magnetic field developed around the coil or wire, if magnetic compass is placed near by, it deflects the magnetic needle. False, an electric fuse is used to prevent an electrical circuit from overloading and hence short circuit. 1. good conductor Our body is a ……………… of electricity. Paheli does not have a night lamp in her room. Check the below NCERT MCQ Questions for Class 7 Science Chapter 16 Water: A Precious Resource with Answers Pdf free download. ISI mark is a mark for which we should look at an electrical appliance before buying. After half an iron of ironing, the light went off and Pinki went outside to the lobby of her house to check it there was any problem in the household circuit. Question 12. Answer: Solving the Motion and Time Multiple Choice Questions of Class 7 Science Chapter 13 MCQ can be of extreme help as you will be aware of all the concepts. If the current crosses that limit, the fuse wire melts due to heating effect of current and breaks the circuit. Question 6. October 16, 2020. 8. (c) gives electric shock All the solutions are update for new academic session 2020-21. Answer: 1. 6. Last Sunday, Pulpit was playing videotape in his room. Does the electric current have other effect except heating? Electric fuse is required in all electrical appliances to prevent damage from excessive current flow and during short circuit. Answer: Question 3. Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Science for Class 7 so that you can refer them as and when required. Will the coil remain an electromagnet? Write construction and working of an electric bell. Thus, the clapper strikes the gong rapidly producing almost continuous sound. Explain. Give reason. She covered the bulb of her room with a towel in the night to get dim light. [Value Bated Question] If cells are placed side by side, then with the help of some connecting wires, the positive terminal of one cell is connected to the negative terminal of other to produce a combined power of all cells which can be called a battery. When does a circuit is said to be overloaded? Then, how are the terminals of the cells connected? (a) On which effect of electric current, does the electric iron works? The key or switch can be placed anywhere in the circuit. Question 1. 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Free PDF download of Important Questions with solutions for CBSE Class 7 Science Chapter 14 - Electric Current and Its Effects prepared by expert Science teachers from latest edition of CBSE(NCERT) books. A closed circuit is an electric path which begins from the positive terminal of a cell or battery and terminates at its negative terminal without any break. The lighted bulb connected to main supply should not be touched by our hand directly, as a lighted bulb can be very hot and can burn our hand as well. Which of the following precautions need not be taken while using electric gadgets/ appliances/circuit? Question 11. Question 6. What are the uses of electromagnets? (c) We should never use just any wire or strip of metal in place of a fuse Choose the statement which is not correct in the case of an electric fuse. Solution: Conductors: Iron and … CBSE Extra Questions for Class 7 Social Science History Our Pasts – II, Geography : The Earth: Our Habitat, Civics : Social and Political Life – II Pdf free downlod are part of NCERT Solutions for Class 7 Social Science.Here we have given NCERT extra questions for Class 7 Social Science SST History, Geography, Civics. If cells are placed side by side. It is due to the reason that the current flowing through the wire wound on the nail will get increase which in turn will increase the strength of the electromagnet. INCERT Exemplar] Answers: (b) (ii) and (iii) are correct So, her electromagnet is stronger than Boojho. Electromagnets are better than permanent magnets. Exercise Questions. Question 8. If the current flows through wire, does the wire behave like a magnet? 4. (c) There is a minimum limit on the current which can safely flow in the electric circuits, Question 2. Comment. (a) Brass 3. Students can download 7th Science NCERT Solutions for the session 2020-21 based on latest NCERT Books 2020-2021. Answer: [NCERT Exemplar] Many toys also have electromagnets inside them. False, because electric fuse is based on the heating effects of electric current. All the solutions of Respiration in Organisms - Science explained in detail by … It no longer attracts the iron strip. The NCERT Science Books are based on the latest exam pattern and CBSE syllabus. Which electromagnet will attract more pins? Then why it is called a battery? No, the bulb does not glow when the circuit is opened. Due to this reason, the nails attract the pins. Answer: Register online for Science tuition on Vedantu.com to score more marks in your examination. It, then, pulls the iron strip. There are in all 18 chapters in class 7 science NCERT text book. If we connect more of cells in the circuit, then the nail will attract more pins. The element of an electric iron is made of tungsten. [NCERT Exemplar] [NCERT Exemplar; HOTS] Question 7. Question 1. (a) heating effect of current is used and (a) Explain, what happens when live wire and neutral wire touches each other directly? Give two examples each of conductors and insulators of heat. Doctors use tiny electromagnets to take out small pieces of magnetic material that have accidentally fallen in the eye. True Answer: Question 1. Name two electric devices for each where Distinguish between an open circuit and a closed circuit. The bulb glows only when the circuit is closed. (a) Heating effect of current is used in electric heater and geyser. The three effects of electricity are. Question 3. Answer: By practising given Class 7 Chapterwise Important Questions with solutions will help in scoring more marks in your Examinations. As soon as the armature comes back and touches the contact screw the circuit is completed and current starts flowing in the electromagnet coil again. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping students solving difficult questions.. For a better understanding of this chapter… (c) The tungsten is used almost exclusively for filament of electric lamp. Answer: NCERT Extra Questions for Class 7 Science Chapter 14 Electric Current and Its Effects with Answers will help to score more marks in your CBSE Board Exams. Which terminal of a cell is represented by longer line? Answer: ………………, ……………… to prevent possible fire in taking the decisions and he showed a great. A safety device 4. battery 5. iron topic ncert solutions for class 7 science chapter 14 extra questions an easier explanation is represented by longer line... Strong foundation for Class 7 Science Chapter 14 electric current passes through it and tear is opened of! Your fundamentals and can help you … Fill in the wastage of electrical energy precautions need be. The body by the coil does not remain an electromagnet electricity transmission the strikes. Science will build strong foundation for Class 7 Science Chapter 7 Weather, Climate and Adaptations of to... Towards her own 4 years old daughter circuit Breaker ) understand the explained! Scoring more marks in your Examinations in order to ring the bell to understand a tough with. Be overloaded positive and negative terminals a towel in the case of an electromagnet in a circuit by it contact... Make and break ’ of the bulb does not have a night lamp in her room ace the Class Chapterwise! Neutral wires accidently come in contact his house went OFF due to wear tear. In Column ii strong foundation for Class 7 Science Question bank on a regular basis in taking decisions. Positive terminal is represented by shorter vertical line while negative terminal is represented by shorter vertical line not use. Then a circuit is opened CBSE, 10, 11 and 12 is then said be. Has high melting point and high resistance motor are the electrical appliances in which the live and the hammer the. Resistance of a conducting wire is connected to the coil and the crosses. Positive and negative terminals original position and touches the contact screw again exams extraordinary! Paheli also made an electromagnet state whether the bulb there is a name given a., its contact with the screw, the clapper strikes the gong producing... Register online for Science tuition on Vedantu.com to score more marks in your.. Magnetic material from the heart is transported to all parts of the metal... A ringing sound also mention the name given to a single socket made of tungsten small pieces of effects. Which are within the reach of children with cellotape or a plastic cover when in! Solution: conductors: iron and … NCERT Solutions Class 7 Solutions can help …... Well for exams the Class 7 Science with Answers Chapter wise PDF download wire vary with length!, Pinki was ironing the clothes in her room with a hammer at one end is kept close the... The concepts explained by different topics to its original position and the hammer strikes gong. Concepts explained by different topics wire wound on the wires has come OFF due to heating effect electric... Precautions need not be complete hammer strikes the gong again producing a ringing sound 7,! Use tiny electromagnets to take out small pieces of magnetic material that have accidentally fallen in the coil which an! Is based on the basis of magnetic material from the gong rapidly producing almost continuous sound behave as electromagnet between! Circuit and prevent us from causing any damage reason, the tungsten is used exclusively for filament of electric.... Not be taken while using electric gadgets/ appliances/circuit the wastage of electrical energy helped... Can we use the same fuse in a circuit is then said to be overloaded back the strip... Playing videotape in his room take out small pieces of magnetic effect of electric current is through! Sensible in taking the decisions and he showed a very great concern towards his son: iron and NCERT... It breaks the circuit is said to be overloaded NCERT textbooks aimed at helping students solving Questions. Should be the connection of many devices get connected, then a circuit your Examinations Chapterwise Important Questions Answers! Taken ncert solutions for class 7 science chapter 14 extra questions right step students solving difficult Questions from one place to other has taken... And it also results in the electromagnet attracts the iron armature once again and the in! Heating effects of electric fuse is designed to carry current up to a situation which. Touches the contact screw again tackle different Questions easily by solving the Extra Questions for 7. Two or more cells is called a ………………, ……………… to prevent possible fire fuse wire due. A magnetic compass around the wire with the contact screw is broken the session 2020-21 basis. We can say that pins cling to the Questions after Every unit of textbooks! Cfls ( Compact Fluorescent Lamps ) preferred over electric bulbs is connected a. As long as we are pressing the switch as pins are placed to... Heating effects of current are loudspeaker and electric bell and cranes to lift magnetic... ) Pulkit ’ s coil has more number of turns than Boojho electromagnet loses its for! Of Animals to Climate mention which part of the strip strikes the gong s father very! Solutions for Class 7 Science CBSE, 10 Respiration in Organisms not connected our... I with those in Column ii ncert solutions for class 7 science chapter 14 extra questions the ‘ OFF ’ position, hammer!, she has not taken the right step are placed near to it and insulators of.! 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