Current Electricity Notes Pdf
Complete Handwritten notes of Chapter No.13: Current Electricity Notes Pdf written by Professor Shahroze Saleem Suib. These notes are very helpful in the preparation of the Current Electricity Notes Pdf for the students of the intermediate and these are according to the paper patterns of all Punjab boards.
Summary and Contents:
Topics which are discussed in the notes are given below:
- Important physics class 12 chapter 13 notes for Intermediate part-I students.
- Important physics class 12 chapter 13 notes pdf for Intermediate part-I students.
- Important Class 12 physics chapter 13 handwritten notes for Intermediate part-I students.
- Important physics class 12 chapter 13 exercise solutions for Intermediate part-I students.
- Important physics class 12 chapter 13 important long questions for Intermediate part-I students.
- Important physics class 12 chapter 13 important questions for Intermediate part-I students.
- Important Class 12 physics ch 13 notes for Intermediate part-I students.
- Important Class 12 physics ch 13 exercise solutions for Intermediate part-I students.
- Important Class 12 physics ch 13 numericals for Intermediate part-I students.
- Important Class 12 physics ch 13 solutions for Intermediate part-I students.
- Important Class 12 physics ch 13 important questions for Intermediate part-I students.
- Definition of electric current and direction of electric
- current through a metallic conductor
- Source of current
- Important physics class 12 chapter 2 handwritten notes for Intermediate part-I students.
- Effects of current are (i) heating effect (ii) magnetic effect (iii) chemical effect
- Ohm's Law
- Review of a series and parallel combinations of resistors
- Important physics class 12 chapter 2 formulas for Intermediate part-I students.
- Resistivity and its dependence upon temperature
- Color code for Carbon resistances
- Important physics class 12 chapter 2 exercise solutions for Intermediate part-I students.
- Rheostat and Thermistors
- Electrical power and power dissipation in resistors
- Important physics chapter 2 notes class 12 for Intermediate part-I students.
- Electromotive force and potential difference
- Maximum power output
- Important physics chapter 2 class 12 notes for Intermediate part-I students.
- Source of current: When two conductors at different potentials are joined by a
metallic wire, current will flow through the wire. The current
continues to flow from higher potential to the lower potential
until both are at the same potential. After this the
current ceases to flow.
- Important notes of ch 2 physics class 12 for Intermediate part-I students.
- Thus the current through the wire
decreases from a maximum value to zero. In order to have a
constant current the potential difference across the conductors
or the ends of the wire should be maintained constant. This is
achieved by connecting the ends of the wire to the terminals of
a device called a source of current.
- Important class 12 physics ch 2 notes for Intermediate part-I students.
- Every source of current converts some non electrical energy
such as chemical, mechanical, heat or solar energy into
electrical energy. There are many types of sources of current.
A few examples are mentioned below:
- Important class 12 physics chapter 2 handwritten notes for Intermediate part-I students.
- (i) Cells (primary as well as secondary) which convert
chemical energy into electrical energy.
(ii) Electric generators which convert mechanical energy
into electrical energy.
- Important class 12 chapter 2 physics notes for Intermediate part-I students.
- (Iii) Thermo-couples which convert heat energy into
electrical energy.
(iv) Solar cells which convert sunlight directly into
electrical energy.
- Important chapter 2 class 12 physics notes for Intermediate part-I students.
- Effects of current: The presence of electric current can be detected by the
various effects which it produces. The obvious effects of the
current are: (i) Heating effect
(ii) Magnetic effect
(iii) Chemical effect
- Important chapter 2 class 12 physics exercise solutions for Intermediate part-I students.
- (i) Heating effect: Current flows through a metallic wire due to motion of free
electrons. During the course of their motion, they collide
frequently with the atoms of the metal. At each collision, they
lose some of their kinetic energy and give it to atoms with
which they collide.
- Important ch2 physics class 12 notes for Intermediate part-I students.
- Thus as the current flows through the wire,
it increases the kinetic energy of the vibrations of the metal
atoms, i.e.. it generates heat in the wire. It is found that the
heat H produced by a current I in the wire of resistance R
during a time interval f is given by: H = I^2Rt , The heating effect of current is utilized m electric heaters,
kettles, toasters and electric irons etc.
- Important ch 2 physics class 12 notes for Intermediate part-I students.
- (ii) Magnetic effect: The passage of current is always accompanied by a
magnetic field in the surrounding space. The strength of the
field depends upon the value of current and the distance from
the current element. The pattern of the field produced by a
current carrying straight wire, a coil and a solenoid.
- Important physics class 12 chapter 2 pdf for Intermediate part-I students.
- (iii) Chemical effect: Certain liquids such as dilute sulphuric acid or copper
sulphate solution conduct electricity due to some chemical
reactions that take place with in them The study of this process
is known as electrolysis.
- Important 12 class physics chapter 2 numerical for Intermediate part-I students.
- The chemical changes produced
during the electrolysis of a liquid are due to chemical effects of
the current. It depends upon the nature of the liquid and the
quantity of electricity passed through the liquid.
- Total Page = 62 pages
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