{"id":17539,"date":"2021-01-30T16:57:31","date_gmt":"2021-01-30T11:27:31","guid":{"rendered":"https:\/\/ncertsolutions.guru\/?p=17539"},"modified":"2021-02-03T14:09:57","modified_gmt":"2021-02-03T08:39:57","slug":"mcq-questions-for-class-11-physics-chapter-9","status":"publish","type":"post","link":"https:\/\/ncertsolutions.guru\/mcq-questions-for-class-11-physics-chapter-9\/","title":{"rendered":"MCQ Questions for Class 11 Physics Chapter 9 Mechanical Properties of Solids with Answers"},"content":{"rendered":"

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

Mechanical Properties of Solids Class 11 MCQs Questions with Answers<\/h2>\n

Solving the Mechanical Properties of Solids Multiple Choice Questions of Class 11 Physics Chapter 9 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Mechanical Properties of Solids Class 11 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 9 Physics Class 11 and cross-check your answers during preparation.<\/p>\n

Question 1.
\nThe ratio of the change in dimension at right angles to the applied force to the initial dimension is known as
\n(a) Youngs modulus
\n(b) Poissions ratio
\n(c) Lateral strain
\n(d) Shearing strain<\/p>\n

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

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

\n

Question 2.
\nHookes law essentially defines
\n(a) Stress
\n(b) Strain
\n(c) Yield point
\n(d) Elastic limit<\/p>\n

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

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

\n

Question 3.
\nTheoretical value of Poissions ratio lies between
\n(a) -1 to 0.5
\n(b) -1 to -2
\n(c) 0.5 to 1
\n(d) None<\/p>\n

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

Answer: (a) -1 to 0.5<\/p>\n<\/details>\n

\n

Question 4.
\nA wire suspended vertically from one of its ends is stretched by attaching a weight of 100N to its lower end. What is the elastic potential energy stored in the wire, if the weight stretches the wire by 1.5 mm?
\n(a) 5 \u00d7 10-2 J
\n(b) 10-3 J
\n(c) 2.5 \u00d7 10-3 J
\n(d) 7.5 \u00d7 10-2 J<\/p>\n

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

Answer: (d) 7.5 \u00d7 10-2 J<\/p>\n<\/details>\n

\n

Question 5.
\nAn iron bar of length l m and cross section A m\u00b2 is pulled by a force of F Newton from both ends so as to produce and elongation in meters. Which of the following statement statements is correct
\n(a) Elongation is inversely proportional to length l
\n(b) Elongation is directly proportional to cross section A
\n(c) Elongation is inversely proportional to A
\n(d) Elongation is directly proportional to Youngs modulus<\/p>\n

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

Answer: (c) Elongation is inversely proportional to A<\/p>\n<\/details>\n

\n

Question 6.
\nOut of the following materials, whose elasticity is independent of temperature?
\n(a) Copper
\n(b) Invar steel
\n(c) Brass
\n(d) Silver<\/p>\n

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

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

\n

Question 7.
\nLongitudinal strain is possible in the case of
\n(a) Gases
\n(b) Liquid
\n(c) Only solids
\n(d) Only gases & liquids<\/p>\n

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

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

\n

Question 8.
\nTwo wires A and B are of the same length. The diameters are in the ratio 1 : 2 and the Youngs modulus are in ratio 2 : 1. if they are pulled by the same force, then their elongations will be in ratio
\n(a) 4 : 1
\n(b) 1 : 4
\n(c) 1 : 2
\n(d) 2 : 1<\/p>\n

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

Answer: (d) 2 : 1<\/p>\n<\/details>\n

\n

Question 9.
\nA body of mass 500 g is fastened to one end of a steel wire of length 2 m and area of cross-section 2 mm\u00b2. if the breaking stress of he wire is 1.25 \u00d7 107 N\/m\u00b2, then the maximum angular velocity with which the body can be rotated in a horizontal circle is
\n(a) 2 rad\/s
\n(b) 3 rad\/s
\n(c) 4 rad\/s
\n(d) 5 rad\/s<\/p>\n

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

Answer: (d) 5 rad\/s<\/p>\n<\/details>\n

\n

Question 10.
\nIf a material is heated and annealed, then its elasticity is
\n(a) Increased
\n(b) Decreased
\n(c) Not change
\n(d) Becomes zero<\/p>\n

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

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

\n

Question 11.
\nA wire suspended vertically from one of its ends is stretched by attaching a weight of 100N to its lower end. What is the elastic potential energy stored in the wire, if the weight stretches the wire by 1.5 mm?
\n(a) 5 \u00d7 10-2 J
\n(b) 10-3 J
\n(c) 2.5 \u00d7 10-3 J
\n(d) 7.5 \u00d7 10-2 J<\/p>\n

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

Answer: (d) 7.5 \u00d7 10-2 J<\/p>\n<\/details>\n

\n

Question 12.
\nOut of the following materials, whose elasticity is independent of temperature?
\n(a) Copper
\n(b) Invar steel
\n(c) Brass
\n(d) Silver<\/p>\n

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

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

\n

Question 13.
\nWhen impurities are added to an elastic substance, its elasticity
\n(a) Increases
\n(b) Decreases
\n(c) Becomes zero
\n(d) May increase or decrease<\/p>\n

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

Answer: (d) May increase or decrease<\/p>\n<\/details>\n

\n

Question 14.
\nA body of mass 1 kg is attached to one end of a wire and rotated in horizontal circle of diameter 40 cm with a constant speed of 2 m\/s. what is the area of cross-section of the wire if the stress developed in the wire is 5 \u00d7 106 N\/m\u00b2?
\n(a) 2 mm\u00b2
\n(b) 3 mm\u00b2
\n(c) 4 mm\u00b2
\n(d) 5 mm\u00b2<\/p>\n

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

Answer: (c) 4 mm\u00b2<\/p>\n<\/details>\n

\n

Question 15.
\nThe ratio of the change in dimension at right angles to the applied force to the initial dimension is known as
\n(a) Youngs modulus
\n(b) Poissions ratio
\n(c) Lateral strain
\n(d) Shearing strain<\/p>\n

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

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

\n

Question 16.
\nWhat is the energy stored per unit volume in a copper wire, which produces longitudinal strain of 0.1%. [Y = 1.1 \u00d7 1011 N\/m\u00b2]
\n(a) 11 \u00d7 103 J\/m\u00b3
\n(b) 5.5 \u00d7 103 J\/m\u00b3
\n(c) 11 \u00d7 104 J\/m\u00b3
\n(d) 5.5 \u00d7 104 J\/m\u00b3<\/p>\n

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

Answer: (d) 5.5 \u00d7 104 J\/m\u00b3<\/p>\n<\/details>\n

\n

Question 17.
\nThe following four wires of length L and the radius r are made of same material. Which of these will have the largest extension when the same tension is applied.
\n(a) L = 50 cm, r = 0.25 mm
\n(b) L = 100 cm, r = 0.5 mm
\n(c) L = 200 cm, r = 1 mm
\n(d) L = 3000 cm, r = 1.5 mm<\/p>\n

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

Answer: (d) L = 3000 cm, r = 1.5 mm<\/p>\n<\/details>\n

\n

Question 18.
\nThe change in the shape of a regular boy is due to
\n(a) Bulk strain
\n(b) Shearing strain
\n(c) Longitudinal strain
\n(d) Volume strain<\/p>\n

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

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

\n

Question 19.
\nThe modulus of elasticity is dimensionally equivalent to
\n(a) Strain
\n(b) Stress
\n(c) Surface tension
\n(d) Poissions ratio<\/p>\n

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

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

\n

Question 20.
\nLongitudinal strain is possible in the case of
\n(a) Gases
\n(b) Liquid
\n(c) Only solids
\n(d) Only gases & liquids<\/p>\n

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

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

\n

Hope the information shared regarding the NCERT MCQ Questions for Class 11 Physics Chapter 9 Mechanical Properties of Solids with Answers Pdf free download is true and genuine as far as our knowledge is concerned. If you feel any information regarding CBSE Class 11 Physics Mechanical Properties of Solids 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 11 Physics Chapter 9 Mechanical Properties of Solids with Answers Pdf free download is available here. MCQ Questions for Class 11 Physics with Answers are prepared as per the Latest Exam Pattern. Students can solve these Mechanical Properties of Solids Class 11 MCQs Questions …<\/p>\n

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