Electrical Circuits falls under Electricity and Magnetism portion of class 12 physics. Electrical Circuits Class 12 Physics Notes is designed according to the updated syllabus of 2080 and it covers all the important portion of the chapter. Students can easily prepare their notes, study for test or exams by taking the help of class 12 electrical circuits Notes.
Chapter – 14
Electrical Circuits
The laws stated by Gustav-Robert Kirchhoff, a German physicist in 1845AD are known a Kirchhoff’s laws. These laws are now known as Kirchhoff’s current law and Kirchhoff’s voltage lak These laws help us to calculate the total effective resistance in a complex electrical circuit, impedance in ac circuit and current flowing through different component of the circuit, unknown emf and terminal potential difference across a cell in the circuit.
Chapter Overview
In this chapter we are going to learn the following concepts, ideas or topics;
Now let’s move on to the notes of electrical circuits. The PDF given below contains all the notes which includes all the topics mentioned in the chapter overview. We request students to use the notes of electrical circuits wisely for the purpose of making notes and preparing for the board examination.
You have to scroll down the PDF to view all the notes of Electrical Circuits. This PDF contains 37 slides in total which contains all the required notes of electrical circuits. It doesn’t contains the numerical problems so if you are searching for the numericals then you’ll find them in the next PDF given below.
Galvanometer
A galvanometer is an electric instrument used to detect feeble currents in electric circuits. It is sensitive and can be used in bridge circuits. In galvanometer, a pivoted coil of fine wire is placed in the magnetic field of a permanent magnet. When there is a current in the coil, the magnetic field produces a torque on the coil that is proportional to the current through the coil. Thus the angular deflection of the coil and pointer is directly proportional to the current and the device can be calibrated to measure current. The maximum deflection typically 90° or so is called full scale deflection.
Hence maximum current through which it shows full scale deflection and let Ig be its value and k is the current measured by a division of the galvanometer which has n number of total division on its scale, then we have Ig = nk, where k is known as the merit of the galvanometer
Electrical Circuits Class 12 Physics Numerical Questions
Those students who want to practice the numericals from electrical circuits chapter can practice the questions given in the PDF below. We have solved the selected numericals which will provide you the method of solving the numericals.
This PDF contains all the important numericals from electrical circuits chapter. In addition to the numericals it also contains all the required formulas used for solving the numerical problems of this chapter.
If you are willing to practise more numerical problems for your examination then you can practice the questions listed below.
These questions are provided for practising purposes. So we haven’t provided the solutions of the numerical problems. However, if you are facing problems while solving these numericals then we request you to copy the questions and paste it in Google to get the solutions of that numericals. If that doesn’t work then you can contact us through our telegram channel to get the solutions.
