Q.13:- A physical quantity P is related to four observables a, b, c and d as follows: The percentage errors of measurement in a, b, c and d are 1%, 3%,…

Q.13:- A physical quantity P is related to four observables a, b, c and d as follows: The percentage errors of measurement in a, b, c and d are 1%, 3%,…

Q.12:- The mass of a box measured by a grocer’s balance is 2.300 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. What is…

Q.11:- The length, breadth and thickness of a rectangular sheet of metal are 4.234 m, 1.005 m, and 2.01 cm respectively. Give the area and volume of the sheet to correct…

Q.9:- The photograph of a house occupies an area of 1.75 cm2on a 35 mm slide. The slide is projected on to a screen, and the area of the house…

Q.8(c):- The mean diameter of a thin brass rod is to be measured by vernier callipers. Why is a set of 100 measurements of the diameter expected to yield a more…

Q.8(b):- A screw gauge has a pitch of 1.0 mm and 200 divisions on the circular scale. Do you think it is possible to increase the accuracy of the screw gauge…

Q.8(a):- You are given a thread and a metre scale. How will you estimate the diameter of the thread? Answer:- Wrap the thread on a uniform smooth rod in such…

Q.7:- A student measures the thickness of a human hair by looking at it through a microscope of magnification 100. He makes 20 observations and finds that the average width of…

Q.6:- Which of the following is the most precise device for measuring length: (a) a vernier callipers with 20 divisions on the sliding scale (b) a screw gauge of pitch 1…

Q.5:- A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance between the Sun and the Earth in terms of…