Question
What are the main characteristics of a standard unit?
✓
Answer
The main characteristics of a standard unit are as follows
(a). It must be well defined.
(b). It must be of proper size. A very small or large size may cause inconvenience.
(c). It should be easily accessible
(d). It must be reproducible at all places without any difficulty.
(e). It must be accurately defined and must not change with time, place, and physical conditions such as pressure, humidity, etc.
(f). It must be widely accepted all over the world.
(a). It must be well defined.
(b). It must be of proper size. A very small or large size may cause inconvenience.
(c). It should be easily accessible
(d). It must be reproducible at all places without any difficulty.
(e). It must be accurately defined and must not change with time, place, and physical conditions such as pressure, humidity, etc.
(f). It must be widely accepted all over the world.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
An aluminium cube of side 5 cm and RD. 2.7 is suspended by a thread in alcohol of relative density 0.80 . Find the tension in thread.
A concave mirror forms a real image of an object placed in front of it at a distance 30 cm, of size three times the size of object. Find (a) the focal length of mirror (b) position of image.
A solid of density 2700 kgm' and of volume 0.0015 m3 is completely immersed in alcohol of density 800 kgm'.Calculate :
1. Weight of solid in SI system.
2. Upthrust on solid in SI system.
3. Apparent weight of solid in alcohol.
4. Will the apparent weight of solid be less or more, if it is immersed completely in brine solution? Give a reason, [ $\left.g =10 ms^{-2}\right]$
→1. Weight of solid in SI system.
2. Upthrust on solid in SI system.
3. Apparent weight of solid in alcohol.
4. Will the apparent weight of solid be less or more, if it is immersed completely in brine solution? Give a reason, [ $\left.g =10 ms^{-2}\right]$
Explain how is the height of mercury column in tube of a simple barometer, a measure of the atmospheric pressure.
The graph shows how the velocity of a scooter varies with time in 50 s.
Work out: Deceleration
Work out: Deceleration
How do you account for (a) positive zero error (b) negative zero error, for calculating correct diameter of wires?
If 2/3rds of a piece of wood submerges in water and 3/4ths of the same piece of wood submerges in oil. Find the density of the oil.
With the help of diagrams, explain the difference between the regular and irregular reflection.
Describe in steps, how would you use a vernier caliper to measure the length of a small rod?
Draw a neat two ray diagram for the formation of images in two plane mirrors, when mirrors are
1. at right angles to each other
2. facing each other.
1. at right angles to each other
2. facing each other.