measurement and measuring instruments class 9

measurement and measuring instruments class 9

Introduction to physics ... Mass Measuring Instruments Stopwatch. Solution 30: Measurement of volume of an irregular solid soluble in water using a graduated cylinder. Solution 32: The time period, T and frequency of oscillation, f are related as, T = 1/ for f = 1/T. MCQs with answers are also given in Chapter 1 Physical Quantities and Measurements notes. Solution 12: Vernier caliper is an instrument used for measuring small lengths of solid objects where an ordinary scale cannot be applied. Calculate the least count and zero error of the screw gauge. We should use screw gauge instead as its least count is 0.01 mm as the thickness of the paper is in the range of 10-2 mm. The relation between liter and metre3 1 metre3 = 1000 liter, Solution 27: Pitch of the screw = 0.5 mm Least count = 0.001 mm Number of divisions = pitch/least count = 0.5/0.001 = 500, Solution 29: Precautions to be taken while measuring volume of a solid lighter than water using displacement method. (c) When the shots are closely clustered together, it shows that repeated measurements yield almost the same reading. Solution 11: Due to constant use, there is space for the play of screw gauge but gradually this space increases with the use or wear and tear, so that when the screw is moved by rotating it in some direction, it slips in the nut and does not cover any linear distance for some rotation of the screw head. in a body is called its mass. In the physical sciences, quality assurance, and engineering. Solution 2: A seconds pendulum is a pendulum which takes 2 seconds to complete one oscillation. Pitch of the screw = distance travelled by screw in n rotations/n rotations. And low least count means high accuracy. In this case, kerosene or any liquid whose density is lighter than water and in which the solid is not soluble is used. We can use screw gauge for this purpose as it can measure the diameter correct up to 1/100 of millimeter or even less. The length of seconds pendulum, where g = 9.8ms-2, is nearly 1 m. Solution 3: A stopwatch is used to measure short intervals of time. The meter scale can measure up to an accuracy of 1mm or 0.1 cm, Solution 69: To measure mass of a body using a physical balance, Filed Under: Frank ICSE, ICSE, Physics Tagged With: Frank ICSE, Frank ICSE Class 9 Physics, Frank ICSE Class 9 Physics Solutions, Frank ICSE Class 9 Physics Solutions - Measurement, Frank ICSE Class 9 Solutions, Frank ICSE Physics, Frank ICSE Physics Solutions, Frank ICSE Solutions, Frank ICSE Solutions for Class 9 Physics, ICSE Previous Year Question Papers Class 10, Frank ICSE Class 9 Physics Solutions - Measurement, Concise Mathematics Class 10 ICSE Solutions, Concise Chemistry Class 10 ICSE Solutions, Concise Mathematics Class 9 ICSE Solutions, Death of a Salesman Essay | Essay on Death of a Salesman for Students and Children in English, Homelessness Essay | Essay on Homelessness for Students and Children in English, Food Essay | Essay on Food for Students and Children in English, Pro Life Essay | Essay on Pro Life for Students and Children in English, Diabetes Essay | Essay on Diabetes for Students and Children in English, Discrimination Essay | Essay on Discrimination for Students and Children in English, World War 2 Essay | Essay on World War 2 for Students and Children in English, Plus Two Computerised Accounting Chapter Wise Questions and Answers Chapter 6 Data Base Management System for Accounting, Plus Two Computerised Accounting Chapter Wise Questions and Answers Chapter 5 Accounting Software Package – GNUKhata, Plus Two Computerised Accounting Chapter Wise Questions and Answers Chapter 4 Graphs and Charts for Business Data, Plus Two Computerised Accounting Chapter Wise Questions and Answers Chapter 3 Use of Spread Sheet in Business Application. Fill the graduated cylinder with the liquid. Solution 13: Least count of an instrument refers to the smallest reading that can be accurately measured while using the instrument. False, the ratchet is used to hold the object under measurement gently between the studs. Measuring the internal diameter of a tube or a cylinder. Solution 3: Two uses of vernier caliper are, Solution 4: Two limitations of metre rule. Turn the ratchet clockwise so as to hold the wire gently in between the studs. Solution 4: Unit is a standard quantity of the same kind with which a physical quantity is compared for measuring it. For an instrument provided with a scale the least count is the value of one division on its scale. Example 1. SI unit of volume is cubic metre (m3), Solution 23: The space occupied by a body is known as its volume. PAGE NO: 46 Solution 1: Unit is a standard quantity of the same kind with which a physical quantity is compared for measuring it. that give a ready measure of the quantities with the help of graduated scales. Therefore in order to get the correct reading, the zero error should always be added to the observed reading. Solution 9: If the zero of the circular scale does not coincide with the zero of the main scale (pitch scale), this is known as zero error. The value of the electrical quantity to be measured is determined from the deflection of these, voltmeter,  glass thermometer and  pressure gauge, Open Circuit Test and Short Circuit Test of Synchronous generator. Mass is always constant for a given body. Solution 8: SI unit of amplitude is metre (m). Solution 6: The time period, T and frequency of oscillation, f are related as, T = 1/f or f = 1/T. Consider a target as in Figure. Table shows the sensitivity of some common instruments for measuring length. Solution 38: The maintenance of standard units is essential because any variation in these standards would lead to wrong measurements, misleading results and confusing generalizations. Solution 12: Following procedure is used to measure the diameter of a wire, Solution 14: Screw gauge measures a small length to a high accuracy because it has the lowest least count among the given three instruments. Multiply this number of vernier division with least count. Solution 35: Measurement is needed for precise description of any phenomenon happening in the world. PAGE NO: 48 Solution 44: If the zero of the circular scale does not coincide with the zero of the main scale (pitch scale) when the end of the movable screw is brought in contact with the fixed end then the screw gauge is said to have a zero error. It is avoided by turning the screw always in the same direction. It is distance between two consecutive threads of the screw. Solution 18: The time period of a pendulum is independent of mass of the bob. Solution 22: Due to constant use, there is space for the play of screw gauge but gradually this space increases with the use or wear and tear, so that when the screw is moved by rotating it in some direction, it slips in the nut and does not cover any linear distance for some rotation of the screw head.

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