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प्रश्न
उत्तर
Two types of errors in measurement are
(a). Random errors-these errors are due to various factors. In a number of observations, we get different readings every time.
These errors can be minimized by making observations a large number of times and taking the arithmetic mean of the readings.
(b). Gross error- these errors are due to the carelessness of the observer like parallax, improper setting of the instrument.
These errors can be minimized only when the observer is careful in setting up of instrument and taking readings.
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संबंधित प्रश्न
Name the instrument which has the least count
1 mm
A vernier has 10 divisions and they are equal to 9 divisions of the main scale in length. If the main scale is calibrated in mm, what is its least count?
The main scale of a vernier callipers is calibrated in mm and 19 divisions of main scale are equal in length to 20 divisions of the vernier scale. In measuring the diameter of a cylinder by this instrument, the main scale reads 35 divisions and 4th division of vernier scale coincides with a main scale division. Find
(i) Least count and (ii) Radius of a cylinder.
Name two factors on which the time period of a simple pendulum depends. Write the relation for the time period in terms of the above named factors.
A seconds pendulum is taken to a place where acceleration due to the gravity falls to one-fourth. How is the time period of the pendulum affected, if at all? Give reasons. What will be its new time period?
Name the most convenient unit of mass you will use to measure:
Mass of small amount of medicine.
Name the most convenient unit of mass you will use to measure:
The bag of sugar
Amongst the unit of volume which is most suitable for measuring:
Volume of a glass filled with milk
