NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics Physics and Measurement-SI Units Revision (Page 1 of 3)

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Units of Physical Quantities

  • The chosen reference standard of measurement in multiples of which, a physical quantity is expressed is called the unit of that quantity. There are two types of physical quantities based on direction.

  • Scalars Quantities: The physical quantities which can represent by only magnitude but no direction are called scalar quantities. i. e. , mass, density, volume, time, etc.

  • Vectors Quantities: The physical quantities required both magnitude and direction to represent it and obey la

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Table of SI Prefixes

Table for SI prefixes.

In given table details about SI Prefixes are given.

Power of 10

Prefix

Symbol

18

Exa

E

15

Peta

P

12

Tera

T

9

Giga

G

6

Mega

M

3

Kilo

K

2

Hecto

H

1

Deka

Da

-1

Deci

D

-2

Centi

C

-3

Milli

M

-6

Micro

Μ

-9

Nano

N

-12

Pico

P

-15

Femto

F

-18

Atto

A

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Conversion of units of Base Quantities

Conversion Tables: When we convert a physical quantity from one set of units to the other, the multiplication factor is required, it is called conversion factor.

Hence, Magnitude of a physical

While conversion from one set of units to the other the magnitude of the quantity must remain same.

Mass:

Conversion table for Mass

In given table for conversation of mass is given.

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