Question

Define unit ,write four properties of good unit

Answer 1

Unit are those standard quantity which is used to  measure the magnitude of the other physical quantities of the same nature.

Units helps in the process of measurement. The Units are different for different physical quantities.

The Four Properties of the units are ⇒

1. Unit are Reproducible.

2. Units should not change with time, place, temperature, or any physical conditions.

3. Units should be of Proper size.

4. Units should be widely accepted all over the world.

Hope it helps.

Answer 2

Unit: A fixed quantity that is used as a standard of measurement is called as an unit.

There are different physical quantities of measurement and different units of measurement for each physical quantity.

Eg: The unit of length is m

Properties:  

• Units are accurate.
• Units don't vary with external factors.
• Units are accepted worldwide.
• Units are standards of measurement.