questions on measurements and experimentation class 9 icse

questions on measurements and experimentation class 9 icse

(a) Define time. In which unit, volume of liquid is measured? Goyal Brothers Measurements and Experimentation Class-9. Name its main parts and state their functions. that can be asked in the final exam. Ask your question. Question 6. Answer: Question 1. You are advised not to use calculator or any other help while answering. (b) Centimetre (cm) Question 2. Density = Mass/volume (c) When positive error is 7 divisions and L.C. Mean of... Data ∴ Correction AQUARIUS EXPECT  your work to be appreciated. The time periods of two simple pendulums at a place are in the ratio 2:1. Area = length × breadth Answer: The circular scale of a screw gauge has 100 divisions. How are the time period T and frequency f of an oscillation of a simple pendulum related ? In linear equation of the form :  3x + y = 5, x – 3y + 8 = 0, x = 5y – 8 etc. Answer: Ans. When negative error is 7 divisions and count (L.C.) OR Correction = – (Error) = – (+0.0125) = – 0.0125 cm (d) metre In any experiment, all observations should be taken with same degree of accuracy. (b) It is not possible to increase the degree of accuracy by mathematical manipulations. (b) Define metre in terms of wavelength of light. If the number of divisions on the left hand of the zero of vernier on the main scale is 38 and the 18th vernier scale division coincides with main scale, calculate the diameter of the sphere, held in the jaws of vernier callipers. You may Re-attempt the test any number of times. The reading of main scale is known and the number of vernier scale divisions coinciding with main scale are known. Does it depend on the amplitude of oscillations? The foot of the ladder is 2.4 m from the wall and the ladder is making an angle of 68o with the ground. Answer: The standard should be some convenient, definite and easily reproducible quantity of the same kind in terms of which the physical quantity as a whole is expressed. Correct length = Length recorded + Correction = 50 “Measurement implies comparison of a physical quantity with a standard unit to find out how many times the given standard is contained in the physical quantity.” Answer: (a) Amplitude : The maximum displacement of bob from mean position on either side is called amplitude. A micrometre screw gauge has a negative zero error of 7 divisions. Answer: Name two factors on which the time period of a simple pendulum does not depend. Get the revision notes in your mailbox! For what range of measurement is micrometre screw gauge used? What do you understand by the following terms as applied to screw gauge? What will be its new time period? It indicates that screw should not be further pushed towards the stud. Waste Generation and Management ... Post a Question. The area of any... An experiment is a procedure carried out to support, refute, or validate a hypothesis. Answer: Question 2. (b) We know time period of a simple pendulum is inversely proportional to the square root of acceleration due to gravity. (b) When does a vernier callipers has, Answer: If the actual boiling point of water is 99.4°C, calculate the percentage error. The graph line should be thin, single straight line and sharp.  1. How much time does the bob of a second's pendulum take to move from one extreme of its oscillation to the other extreme? Find its mass in kg. Question 5. (b) (a) A vernier scale has 20 divisions. Amongst the units of volume (i) cm3 (ii) m3 (iii) litre (iv) millilitre, which is most suitable for measuring : (a) Volume of a swimming tank (b) A second’s pendulum is taken on the surface of moon where acceleration due to gravity is l/6th of that of earth. (b) Oscillation : “One complete to and fro motion of the pendulum” is called an oscillation. Name the instrument which can accurately measure the following, The internal diameter of the neck of a water bottle. Find. (b) What do you understand by the terms (i) independent variable, (ii) dependent variable? 'The distance of a star from the earth is 8.33 light minutes.' Answer: (c) Amplitude = 0.561 cm. It is denoted by ‘a’. The time period of two pendulums are 2 s and 3 s respectively. Solution: Question 3. Select the correct option: 1. Aquarius Horoscope for Monday - July 13, 2020.

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