Magnetic lines of force notes class 12th
Mr. Ali
Magnetic lines of force Magnetic lines of force are imaginary lines that show the direction of the magnetic field. Properties of magnetic lines of force Magnetic lines of force always…
Physics12th
What is magnetic field class 12th
Magnetic field The field around a magnet in which a magnetic needle is subjected to a torque, causing it to rotate and stay in a fixed direction. The direction of…
What is electrical circuits
Electric circuit An electrical circuit is a closed, continuous path through which electric current can flow. In a complete electrical circuit, electricity flows from a power source, such as a…
Series and parallel circuits
Series circuit In this type of combination, the negative pole of one cell and the positive pole of the other, the negative pole of the second and the positive pole…
wheatstone bridge principle
Principle According to this principle, If four resistances are connected in series and represented by the four sides of a parallelogram and one diagonal of the quadrilateral is connected to…
What is Kirchhoff’s Law
Kirchhoff’s law He has two rules. 1. Junction rule or Kirchhoff’s current law (KCL) According to this rule, the value of the current coming at a junction is equal to…
Specific resistance or resistivity
It is represented by ρ. When electric current is impressed in conductor, then ratio of current density i in a conductor and intensity of the electric field is called the…
Derivation of ohm’s law
Ohm’s law According to this law, If there is no change in the physical state of a conductor, then the ratio of the electric potential difference applied at its ends…
Electrical current and Ohm’s Law
Electric current If q charge flows in a circuit in time t, then electric current flowing in circuit is__ i = q/t Ampere When, t = 1 sec i =…
Van De Graaff Generator Working And Derivation
Principle With the help of Van De Graaff generator, very high voltage of the order of 10⁶ volt can be generated. Its principle is based on two electrostatic phenomena. 1.…