Mother's International Academy 9th Grade Science (Physics) Past Exam Paper PDF

MOTHER’S INTERNATIONAL ACADEMY Affiliated to CBSE New Delhi (10+2) Half Yearly Examination (Session 2024-25) STD -IX Total Marks - 50 Subject: SCIENCE...

MOTHER’S INTERNATIONAL ACADEMY Affiliated to CBSE New Delhi (10+2) Half Yearly Examination (Session 2024-25) STD -IX Total Marks - 50 Subject: SCIENCE Time Allotted: 2 Hrs. General Instructions:  This question paper consists of three parts i.e. Physics, Chemistry and Biology.  Physics carries 16 marks, Chemistry carries 16 marks and Biology carries 18 marks.  Physics contains sections A, B and C.  Reply to each question is compulsory.  Marks and the types of question is written against the each section of this question paper. PHYSICS Section-A Multiple choice Questions: Each question from 1 to 3 contains one mark. 1.) The Earth’s atmosphere is held by the a.) Wind b.) Clouds c.) Earth’s magnetic field d.) Gravity 2.) The gravitational force between two bodies does not depend on a.) their masses b.) their separation c.) the product of their masses d.) the medium between two bodies 3.) If the v-t graph is a straight line inclined to the time axis, then: a.) a ≠ 0 b.) a = constant ≠ 0 c.) a ≠ constant ≠ 0 d.) a = 0 Assertion and reason type questions: Each question from 4 to 6 contains one mark. Read the instruction carefully: (a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct e explanation of Assertion (A). (b) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A). (c) Assertion (A) is true but Reason (R) is false. (d) Assertion (A) is false but Reason (R) is true. 4.) Assertion: A tiger can accelerate from rest at the rate of 4 m/s2 Reason: The velocity attained by it in 10s is 40 m/s. 5.) Assertion: Universal gravitational constant G is a scalar quantity. Reason: The value of G is same throughout the universe. 6.) Assertion: A man is sitting in a boat which floats on a pond. If the man drinks some water from the pond, the level of water in the pond will decrease.  Reason: The weight of the liquid displaced by the body is greater than the weight of the body. Section-B Each question number 8 and 9 contains two marks. 7.) Determine the gravitational force if the mass of two bodies are 80 kg and 200 kg and they are separated by a distance of 6m. 8.) The earth attracts an apple. Does the apple also attract the earth? If it does, why does the earth not move towards the apple? Section-C Each question number 9 contains six marks. 9.) Archimedes’ principle, stated as follows: When a body is immersed fully or partially in a fluid, it experiences an upward force that is equal to the weight of the fluid displaced by it. The upward force is known as up thrust or buoyant force. In fact, all objects experience a force of buoyancy when they are immersed in a fluid. The magnitude of this buoyant force depends on the density of the fluid. Objects having density less than that of the liquid in which they are immersed float on the surface of the liquid. If the density of the object is more than the density of the liquid in which it is immersed then it sinks in the liquid. Hence body will float or sink depends upon difference between density of body and fluid. i.) The up thrust of the body is equal to the (a) Mass of liquid (b) Weight of liquid (c) Weight of liquid displaced by body (d) None of these ii.) If the density of the object is more than the density of the liquid in which it is immersed then (a) It sinks in liquid (b) It floats on liquid (c) It comes out of liquid (d) None of these iii.)The up thrust of the body is equal to the (a) Mass of liquid (b) Weight of liquid (c) Weight of liquid displaced by body (d) None of these iv.) State Archimedes’ principle. v.) Why does cube of plastic released deep down under the water come up to surface of water?