NCERT Grade 12 Physics, Chapter 3, Current Electricity from Unit 2, Current Electricity deals with electric current, circuits, resistance, laws governing the nature of electric current, etc. In this chapter, students shall study some of the basic laws concerning steady electric currents. Electric Current, Electric Currents in Conductors, Ohm’s Law, Drift of Electrons and the Origin of Resistivity, Mobility, Limitations of Ohm’s Law, Resistivity of Various Materials, Temperature Dependence of Resistivity, Electrical Energy, Power, Combination of Resistors – Series and Parallel, Cells, EMF, Internal Resistance, Cells in Series and in Parallel, Kirchhoff’s Rules, Wheatstone Bridge, Meter Bridge, Potentiometer are the topics discussed in this chapter.
Circuit diagrams, graphs, illustrations, energy diagrams and examples associated with daily life make this chapter very interesting and easy to learn. Solved numeral problems and unsolved for practice make the students understand the concept better and develop a strong grip on the subject. A contribution of eminent scientists such as Ohm and Kirchhoff towards electricity has helped to develop laws on electricity and current. A consolidated table denoting symbols, dimensions and units of different physical quantities associated to electric current concludes the chapter at a glance. NCERT Grade 12 Physics, Chapter 3, Current Electricity from Unit 2, Current Electricity. Unit 2 holds a total weightage of 7 marks in the final examination according to the latest pattern.
Get 100 percent accurate NCERT Solutions for Class 12 Physics Chapter 3 (Current Electricity) solved by expert Physics teachers. We provide solutions for questions given in Class 12 Physics text-book as per CBSE Board guidelines from the latest NCERT book for Class 12 Physics. The topics and sub-topics in Chapter 3 Current Electricity are given below.
Ex 3.1 - INTRODUCTION
Ex 3.2 - ELECTRIC CURRENT
Ex 3.3 - ELECTRIC CURRENTS IN CONDUCTORS
Ex 3.4 - OHM’S LAW
Ex 3.5 - DRIFT OF ELECTRONS AND THE ORIGIN OF RESISTIVITY
Ex 3.5.1 - Mobility
Ex 3.6 - LIMITATIONS OF OHM’S LAW
Ex 3.7 - RESISTIVITY OF VARIOUS MATERIALS
Ex 3.8 - TEMPERATURE DEPENDENCE OF RESISTIVITY
Ex 3.9 - ELECTRICAL ENERGY, POWER
Ex 3.10 - COMBINATION OF RESISTORS – SERIES AND PARALLEL
Ex 3.11 - CELLS, EMF, INTERNAL RESISTANCE
Ex 3.12 - CELLS IN SERIES AND IN PARALLEL
Ex 3.13 - KIRCHHOFF’S RULES
Ex 3.14 - WHEATSTONE BRIDGE
Ex 3.15 - METER BRIDGE
Ex 3.16 - POTENTIOMETER.
We cover all exercises in the chapter given below:-
Chapter 3 Exercises - 23 Questions with Solutions.
Other than given exercises, you should also practice all the solved examples given in the book to clear your concepts on Current Electricity. Download the free PDF of Chapter 3 Current Electricity and take the print out to keep it handy for your exam preparation.