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Class notes

Class 11 Units and Measurements

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  • Course
  • JEE/NEET
  • Institution
  • JEE/NEET

These are perfect go to notes for class 11 chapter 1 i.e. Units and Measurements which consists of topics dimensional analysis, vernier calipers, screw gauge, error analysis, principle of homogeneity, significant figures and rounding off

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Document information

  • October 10, 2023
  • 56
  • 2023/2024
  • Class notes
  • Alakh pandey
  • 11 to 12

Subjects

  • vernier calipers
  • screw gauge
  • error analysis
  • principle of homogeneity
  • significant figures

Written for

  • JEE/NEET
All documents for this subject (13)

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, Units and Measurements

T
- Physical Quantity (PC)
The which be measured
quantities can
by an



instrument & Which describes the laws of
World
physical .




PG =
d X U


L I


Unit (a comparisions
No .


of times of
unit




# Types of Physical Quantifies
W V W




Derived Physical
Fundamental Supplementary
Physical Quantity Quantity Physical Quantify

,1) Fundamental Physical Quantity :t Which do not

depend on
any
other
physical Quantity

Sr No
: .
PD S I Unit
.




Symbol
i) Length Meter M




ii) Mass Kilogram Ky

iii) Time seconds S


iv) Temperature Kelvin k


v) Electric Ampere A

Current


vif Luminous
Candela Cd
Intensity
vii) Amount of Mole mot
substance

, 2) Derived Physical Quantity :-> Which are made
up
of Fundamental Physical Quantity ·




eg)
i) Area =

m2

breadth
>
Length x
=



length length
x




ii) Volume -> i



i Velocity ->
displacement =
length
time
time



if Force =




mass x acceleration
=

N =


Rym/s2

~Work
=


Joul =
Rym2/s2

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