Question

1) what is meant by a unit ? 2) what are the desirable features of a standard unit? 3) how can we express the magnitude of a physical quantity? 4)write the names of the letters in the relation P=NU 5) how can we measure a physical quantity ?explain​

Answer 1

Answer:

1 A unit is any standard used for making comparisons in measurements.

2 Desirable characteristics of physical standard:

A physical standard should be suitable in size and well defined.

It should be durable and accurately reproducible at all places.

It should be easily comparable experimentally with other similar physical quantities. This conversation is already closed by Expert.

3 Magnitude is the amount or number which is written before a unit and is used to express physical quantity.

5 Physical quantity is the property of an object that can be quantified. For instance, the physical quantities are the length of a rod or the mass of a body

hope u like it!!

Answer 2

Answer:

1) Units are measurement standards for physical quantities that require precise definitions in order to be useful.

2) The following characteristic of standard unit are:

(a) It should be easily understandable

(b) It should not change with time and place.

(c) It should be easily duplicated

(d) It should be properly defined.

3) The magnitude of a physical quantity can be expressed as $A*10^{n}$

4) Here P denotes the Power, N is the Force and U is the potential Energy.

5) For measuring any physical quantity involves comparison with certain

basic, international accepted reference standard called unit.

#SPJ2