Units and Measurement
| Description: All about unit and measurement | |
| Number of Questions: 15 | |
| Created by: Karuna Seth | |
| Tags: Units Measurement Accuracy Errors System of Units and Standards International System of Units System of Units & Standards Vernier Calipers and Screw Gauge (Micrometer) Vernier Calipers Units, Measurements and Dimensions Units and Measurement Error Analysis Error Propagation |
The atomic standard of time is based on the periodic vibrations produced in which of the following?
Which of the following units does not belong to the group of non-SI unit?
Roentgen, Barn, Carat, Hour, Kilogram, Quintal, Degree
SI multiples of metre are used with different names. Value equal to 10-9m is called _____________ and value equal to 109m is called ___________.
________ is used to measure lengths ranging from 10-3m to 10-2m.
Which of the following errors is there, if the temperature graduations of a thermometer read 104 °C at the boiling point of water at STP?
Which of the following matches incorrectly with its unit?
Suppose the true value of a certain length is near 3.678 cm. In one experiment, using a measuring instrument of resolution 0.1 cm, the measured value is found to be 3.5 cm, while in another experiment using a measuring device of resolution, say 0.01 cm, the length is determined to be 3.38 cm. What is the conclusion?
If a vernier calliper is used for measurement and the zero mark of vernier scale does not coincide with the zero mark of the main scale, then which of the following errors will be shown in the result?
Which of the following steps can reduce the least count error in a measurement? (a) Using instruments of higher precision (b) Improving experimental techniques (c) Always take an idea of actual value before measuring (d) Repeating the observations several times
How many significant figures does the length of an object have after measurement 4567.81?
The preceding digit is raised by 1, if the insignificant digit to be dropped, (the underlined digit in this case) is ____________ .
The metre is the length of the path travelled by ________________ in _________________ during a time interval of 1/299, 792, 458 of a second.
Suppose the values obtained in several measurements are a1, a2, a3...., an. If the arithmetic mean of these values = a mean, what will be the formula to find the error in the third measured value?
Large distances (such as the distance of a planet or a star from the earth) cannot be measured directly with a meter scale. It is done by ________.
Students were asked to calculate the length, mass and time in CGS unit. In which of the following units should their answer be?