{"id":18091,"date":"2021-10-18T11:35:08","date_gmt":"2021-10-18T06:05:08","guid":{"rendered":"https:\/\/mcq-questions.com\/?p=18091"},"modified":"2022-03-02T10:21:07","modified_gmt":"2022-03-02T04:51:07","slug":"mcq-questions-for-class-9-science-chapter-11","status":"publish","type":"post","link":"https:\/\/mcq-questions.com\/mcq-questions-for-class-9-science-chapter-11\/","title":{"rendered":"MCQ Questions for Class 9 Science Chapter 11 Work and Energy"},"content":{"rendered":"

Students are advised to practice the NCERT MCQ Questions for Class 9 Science Chapter 11 Work and Energy with Answers Pdf free download is available here. MCQ Questions for Class 9 Science with Answers<\/a> are prepared as per the Latest Exam Pattern. Students can solve these Work and Energy Class 9 MCQs Questions with Answers and assess their preparation level.<\/p>\n

Work and Energy Class 9 MCQs Questions with Answers<\/h2>\n

Solving the Work and Energy Multiple Choice Questions of Class 9 Science Chapter 11 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Work and Energy Class 9 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 11 Science Class 9 and cross-check your answers during preparation.<\/p>\n

Multiple Choice Questions<\/span><\/p>\n

Question 1.
\nWhen a body falls freely towards the earth, then its total energy:
\n(a) increases
\n(b) decreases
\n(c) remains constant
\n(d) first increases and then decreases<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) remains constant<\/p>\n<\/details>\n

\n

Question 2.
\nIn case of negative work, the angle between the force and displacement is:
\n(a) 0\u00b0
\n(b) 45\u00b0
\n(c) 90\u00b0
\n(d) 180\u00b0<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) 180\u00b0<\/p>\n<\/details>\n

\n

Kinetic Energy Calculator<\/a> calculates the kinetic energy as well as mass and velocity of an object.<\/p>\n

Question 3.
\nWater stored in a dam possesses:
\n(a) no energy
\n(b) electrical energy
\n(c) kinetic energy
\n(d) potential energy<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) potential energy<\/p>\n<\/details>\n

\n

Question 4.
\nWhich one of the following is not the unit of energy?
\n(a) Joule
\n(b) Newton meter
\n(c) Kilowatt
\n(d) Kilowatt hour<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) Kilowatt<\/p>\n<\/details>\n

\n

Question 5.
\nA body is falling from a height h, After it has fallen a height \\(\\frac{h}{2}\\), it will possess:
\n(a) only potential energy
\n(b) only kinetic energy
\n(c) half potential and half kinetic energy
\n(d) more kinetic and less potential energy<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) half potential and half kinetic energy<\/p>\n<\/details>\n

\n

Question 6.<\/span><\/p>\n

The capacity of a body to perform work is called:
\n(a) Energy
\n(b) Work
\n(c) Power
\n(d) Heat<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Energy<\/p>\n<\/details>\n

\n

Question 7.
\nThe rate of work done is called:
\n(a) Energy
\n(b) Power
\n(c) Capacity
\n(d) All of these<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Power<\/p>\n<\/details>\n

\n

Question 8.
\nThe capacity to perform work is obtained from :
\n(a) Food
\n(b) Energy
\n(c) Power
\n(d) All of these<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Energy<\/p>\n<\/details>\n

\n

Question 9.
\nAn object of mass, m moving with velocity v has a kinetic energy of:
\n(a) \\(\\frac{1}{2} m v^{2}\\)
\n(b) mgh
\n(c) \\(\\frac{2 m}{v^{2}}\\)
\n(d) 2mv2<\/sup><\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) \\(\\frac{1}{2} m v^{2}\\)<\/p>\n<\/details>\n

\n

Question 10.
\nThe gravitational potential energy of an object of mass, m raised through a height, h from the earth’s surface is given by:
\n(a) \\(\\frac{1}{2}\\) mv2<\/sup>
\n(b) mgh
\n(c) \\(\\frac{1}{2}\\) mgh
\n(d) 2mgh<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) mgh<\/p>\n<\/details>\n

\n

Question 11.
\nIf the displacement of the object is zero then the work done on an object by a force would be:
\n(a) 1 Joule
\n(b) 0.1 Joule
\n(c) 3.6 \u00d7 106<\/sup> Joule
\n(d) zero<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) zero<\/p>\n<\/details>\n

\n

Question 12.
\nWhat is the energy possessed by an object due to its motion?
\n(a) Potential energy
\n(b) Electrical energy
\n(c) Kinetic energy
\n(d) None of them<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) Kinetic energy<\/p>\n<\/details>\n

\n

Fill in the Blanks.<\/span><\/p>\n

Question 13.
\n1 kJ equals ______<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: 1000 J<\/p>\n<\/details>\n

\n

Question 14.
\n_______ formulated a law for the heating effect of electric current.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: James Prescott Joule<\/p>\n<\/details>\n

\n

Question 15.
\nThe kinetic energy of an object ______ with its speed.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: increases<\/p>\n<\/details>\n

\n

Question 16.
\nAn object in motion possesses what is known as the ________ of the object.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: kinetic energy<\/p>\n<\/details>\n

\n

Question 17.
\nThe S.I. unit of power is ________<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Watt<\/p>\n<\/details>\n

\n

Question 18.
\nThe energy total of every system always remains _________<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: constant<\/p>\n<\/details>\n

\n

Question 19.
\nThe energy stored in the water-filled in the dam is _________<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: potential energy<\/p>\n<\/details>\n

\n

Question 20.
\nThe S.I. unit of kinetic energy is ________<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Joule<\/p>\n<\/details>\n

\n

Question 21.
\nThe S.I. unit of work is ________<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Joule<\/p>\n<\/details>\n

\n

Question 22.
\nThe rate of work done is called _______<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: power<\/p>\n<\/details>\n

\n

True\/False.<\/span><\/p>\n

Question 23.
\nThe energy used in one hour at the rate of 1 kW is called 1 kWh.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 24.
\nJames Prescott Joule is best known for his research in electricity and thermodynamics.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 25.
\nAny object that does not possess energy can do work.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: False<\/p>\n<\/details>\n

\n

Question 26.
\nThe unit of energy is, the same as that of work.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 27.
\nWork = Force \u00d7 Displacement along the direction of the force.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 28.
\nThe formula of kinetic energy is EK<\/sub> = mgh.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: False<\/p>\n<\/details>\n

\n

Question 29.
\nWork is a vector quantity.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: False<\/p>\n<\/details>\n

\n

Question 30.
\nThe unit of energy in the C.G.S. system is erg.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 31.
\nThe palm gets warmed while rubbing due to performing work.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 32.
\nWork has only magnitude and no direction.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Match the Column.<\/span><\/p>\n

Question 33.<\/p>\n\n\n\n\n\n\n\n\n
A<\/td>\nB<\/td>\n<\/tr>\n
1. 1 Joule<\/td>\n(i) Scalar quantity<\/td>\n<\/tr>\n
2. Work<\/td>\n(ii) 746 Watt<\/td>\n<\/tr>\n
3. Power<\/td>\n(iii) Force \u00d7 Displacement<\/td>\n<\/tr>\n
4. 1 horsepower<\/td>\n(iv) 1 Newton \u00d7 1 meter<\/td>\n<\/tr>\n
5. Energy<\/td>\n(v) Work\/Time<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\nAnswer<\/span><\/summary>\n

Answer:<\/p>\n\n\n\n\n\n\n\n\n
A<\/td>\nB<\/td>\n<\/tr>\n
1. 1 Joule<\/td>\n(iv) 1 Newton \u00d7 1 meter<\/td>\n<\/tr>\n
2. Work<\/td>\n(iii) Force \u00d7 Displacement<\/td>\n<\/tr>\n
3. Power<\/td>\n(v) Work\/Time<\/td>\n<\/tr>\n
4. 1 horsepower<\/td>\n(ii) 746 Watt<\/td>\n<\/tr>\n
5. Energy<\/td>\n(i) Scalar quantity<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/details>\n
\n

Answer in one Word\/Sentence.<\/span><\/p>\n

Question 34.
\nIs work done or energy a scalar or a vector quantity?<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Scalar<\/p>\n<\/details>\n

\n

Question 35.
\nIs power is a scalar or a vector quantity?<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Scalar<\/p>\n<\/details>\n

\n

Question 36.
\nWho verified experimentally the law of conservation of energy and discovered the value of the mechanical equivalent of heat?<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: James Prescott Joule<\/p>\n<\/details>\n

\n

Question 37.
\nWrite an expression for the kinetic energy of an object.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Kinetic energy, EK<\/sub> = \\(\\frac{1}{2}\\) mv2<\/sup><\/p>\n<\/details>\n

\n

Question 38.
\nWhat is called the sum of the kinetic and potential energies of an object?<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Mechanical energy<\/p>\n<\/details>\n

\n

Question 39.
\nWrite the S.I. unit of power.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Watt<\/p>\n<\/details>\n

\n

Question 40.
\nWhat is defined as the capacity of doing work?<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Energy<\/p>\n<\/details>\n

\n

Hope the information shared regarding the NCERT MCQ Questions for Class 9 Science Chapter 11 Work and Energy with Answers Pdf free download is true and genuine as far as our knowledge is concerned. If you feel any information regarding CBSE Class 9 Science Work and Energy MCQs Multiple Choice Questions with Answers is missing do reach us and we will look into it and add it accordingly.<\/p>\n","protected":false},"excerpt":{"rendered":"

Students are advised to practice the NCERT MCQ Questions for Class 9 Science Chapter 11 Work and Energy with Answers Pdf free download is available here. MCQ Questions for Class 9 Science with Answers are prepared as per the Latest Exam Pattern. Students can solve these Work and Energy Class 9 MCQs Questions with Answers …<\/p>\n

MCQ Questions for Class 9 Science Chapter 11 Work and Energy<\/span> Read More »<\/a><\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","spay_email":""},"categories":[35],"tags":[],"yoast_head":"\nMCQ Questions for Class 9 Science Chapter 11 Work and Energy - MCQ Questions<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mcq-questions.com\/mcq-questions-for-class-9-science-chapter-11\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MCQ Questions for Class 9 Science Chapter 11 Work and Energy - MCQ Questions\" \/>\n<meta property=\"og:description\" content=\"Students are advised to practice the NCERT MCQ Questions for Class 9 Science Chapter 11 Work and Energy with Answers Pdf free download is available here. 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