Class 11 Physics Ch 1 Notes

Important Easy to understand Notes of Physics of Class 11 Physics Ch 1 Notes Introduction to Physics written by Professor Mr. Asad Abbas Suib. These notes are very helpful in the preparation of Class 11 Physics Ch 1 Notes for students of the 11th class and these are according to the paper patterns of all Punjab Book Boards.

Summary and Contents:
Topics which are discussed in the notes are given below:
  • Very Important Multiple Choice Questions Ch 1 Class 11 Physics Notes with Answers of the Chapter No. 1: Introduction to Physics in 1st Year Physics Punjab Book Boards.
  • What is Natural Philosophy?
  • Very Important class 11 physics ch 1 mcqs from Punjab Textbook.
  • Give the Classes of Study of nature OR What is difference b/w Biological and Physical science
  • Define Physics.
  • Very Important class 11 physics ch 1 important questions from Punjab Textbook.
  • Write the Main frontiers of fundamental sciences.
  • Give the Areas of Physics?
  • Define the Branches of Physics (Nuclear, solid state, particle physics and Relativistic mechanics).
  • Very Important ch 1 physics class 11 notes from Punjab Textbook.
  • Give the Importance/Role Of Physics in few lines.
  • What are Physical Quantities? Give examples
  • What are Base Quantities? Give examples.
  • Very Important ch 1 physics notes class 11 from Punjab Textbook.
  • What are Derived Quantities? Give examples.
  • What are the Steps For Measurement Of Physical Quantity?
  • What are the Characteristics Of An Ideal Standard?
  • Very Important class 11 ch 1 physics notes from Punjab Textbook.
  • What is International System Of Units? From which types of units it is built up from?
  • Define Base Units. Write the table for base units.
  • Very Important class 11 physics ch 1 extra questions from Punjab Textbook.
  • Define Derived Units. Give examples.
  • What are Supplementary Units? OR Define Radian and Steradian.
  • Very Important class 11 physics ch 1 pdf from Punjab Textbook.
  • What is Scientific Notation? give example
  • Write the Conventions for indicating units?/ Rules for writing units.
  • What is error? Write causes of error also differentiate b/w Random error and Systematic error.
  • Very Important notes of ch 1 physics class 11 from Punjab Textbook.
  • What are Significant Figures? Write the rules of significant figures. Also describe the rules for rounding off a number
  • What is Precision And Accuracy? OR What is difference b/w Precision and Accuracy?
  • Very Important physics ch 1 notes class 11 from Punjab Textbook.
  • What are Absolute uncertainty, Fractional uncertainty and Percentage uncertainty?
  • Example 01: For example for instrument L.C=0.1 Cm Measurement=25.5cm calculate uncertainties
  • Example 02: For example for instrument L.C=0.01 Cm Measurement=0.45 cm calculate uncertainties
  • Very Important class 11 physics ch 1 notes units and measurements from Punjab Textbook.
  • Assessment Of Total Uncertainty In Final Result  i. In case of Addition and Subtraction  ii. In case of Multiplication and Division iii. In Case Of Power Factor iv. In Case of average value of Many Measurement v. In Case of timing Experiment.
  • What are the Dimensions of Physical Quantities?
  • Examples of Dimensions
  • Very Important class 11 physics ch 1 exercise solutions from Punjab Textbook.
  • 1. To check the homogeneity of physical equation OR Principle of homogeneity 
  • Name several repetitive phenomenon’s occurring in nature which could serve reasonable time standards?
  • Give the drawbacks to use the period of a pendulum as a time standard?
  • Very Important class 11 physics ch 1 numericals from Punjab Textbook.
  • Why do we find it useful to have two units for the amount of substance, the kilogram and the mole?
  • Three students measured the length of a needle with a scale on which minimum division is 1mm and recorded as (i) 0.2145m (ii) 0.21m (iii) 0.214m which record is correct and why?
  • Very Important ch 1 physics class 11 important questions from Punjab Textbook.
  • An old saying is that “A chain is only as strong as its weakest link”. What analogous statement can you make regarding experimental data used in a computation?
  • The period of simple pendulum is measured by a stop watch. What types of errors are possible in the time period? 
  • Very Important ch 1 physics class 11 short notes from Punjab Textbook.
  • Does a dimensional analysis give any information on constant of proportionality that may appear in an algebraic expression? Explain?
  • Write the dimensions of (i) Pressure (ii) Density?
  • Very Important ch 1 physics class 11 solutions from Punjab Textbook.
  • The wavelength λ of a wave depends on the speed v of the wave and its frequency f. knowing that [Lambda ] = [ L]
  •  A light year is the distance light travels in one year. How many meters are there in one light year:
  • How many seconds are there in 1 year?
  • Very Important ch 1 physics class 11 pdf from Punjab Textbook.
  • How many nanoseconds in 1 year?
  • How many years in 1 second?
  • The length and width of a rectangular plate are measured to be 15.3cm and 12.80cm, respectively. Find the area of the plate.
  • Very Important ch 1 physics class 11 questions from Punjab Textbook.
  • Add the following masses given in kg upto appropriate precision.2.189, 0.089, 11.8 and 5.32?
  • Find the value of ‘g’ and its uncertainty using  form the following measurements made during an experiment, Length of simple pendulum l = 100cm. Time for 20vibrations = 40.2s.
  • Very Important ch 1 physics class 11 important topics from Punjab Textbook.
  • What are the dimensions and units of gravitational constant G in the formula
  • Show that the expression Vf = Vi + at if  is dimensionally correct, where Vi is the velocity at t =0, a is acceleration and Vf is the velocity at time t.
  • Very Important ch 1 physics class 11 exercise from Punjab Textbook.
  • The speed v of sound waves through a medium may be assumed to depend on (a) the density p of the medium and (b) its modulus of elasticity E which is the ratio of stress to strain. Deduce by the method of dimensions, the formula for the speed of sound.
  • Very Important ch 1 physics class 11 numericals from Punjab Textbook.
  • Show that the famous “Einstein equation” E = mc2 is dimensionally consistent 
  • Suppose, We are told that the acceleration of a particle moving in a circle of radius r with uniform speed v is proportional of r, say rn, and some power of v, say vm, determine the powers of r and v? 

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