Read and download the CBSE Class 12 Physics Current Electricity Solved Examples. Designed for 2026-27, this advanced study material provides Class 12 Physics students with detailed revision notes, sure-shot questions, and detailed answers. Prepared by expert teachers and they follow the latest CBSE, NCERT, and KVS guidelines to ensure you get best scores.
Advanced Study Material for Class 12 Physics Chapter 3 Current Electricity
To achieve a high score in Physics, students must go beyond standard textbooks. This Class 12 Chapter 3 Current Electricity study material includes conceptual summaries and solved practice questions to improve you understanding.
Class 12 Physics Chapter 3 Current Electricity Notes and Questions
CBSE Class 12 Physics Current Electricity Solved Examples. Please refer to the examination notes which you can use for preparing and revising for exams. These notes will help you to revise the concepts quickly and get good marks.
Ex. 1 A cylindrical wire is stretched to increase its length by 10%. The percentage increase in the resistance of the wire will be–
(A) 20% (B) 21% (C) 22% (D) 24%
Ex. 2 The equivalent resistance between A and B
is–
(A) 2R/3 (B) R/3 (C) R (D) 3R
Sol. (A)The circuit is equivalent to Fig. It is a balanced wheatstone bridge between abcd, and then in parallel (2R) resistances. Thus ignoring resistance between bd arm. The circuit is equivalent to three (2R) resistances in parallel
(abc, adc, aRRc).
Ex. 3 In the adjoining network of resistors, each is of resistance r ohm, the equivalent resistance
between points A and B is–
Imagine, A being pulled on the left side, then abcd becomes a balanced wheatstone bridge Fig. The arm bd can be ignored. Then resistance between A, B becomes = .i.e.1/Req=1/2r /+1/2r=1/r = Req =r
Ex. 6 Fig. represents a balanced Wheatstone's Bridge. The value of resistance R will be–
Ex. 7 An electric current of 5 amp. is divided in three branches forming a parallel combination. The length of the wire in the three branches are in the ratio, 2, 3 and 4 ; their diameters are in the ratio 3, 4 and 5. Find the currents in each branch if the wire are of the same material.
Sol Let the length of three wires be 2l, 3l and 4l respectively and their radii be 3r, 4r and 5r respectively. If S be the specific resistance,then
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CBSE Class 12 Physics Chapter 3 Current Electricity Study Material
Students can find all the important study material for Chapter 3 Current Electricity on this page. This collection includes detailed notes, Mind Maps for quick revision, and Sure Shot Questions that will come in your CBSE exams. This material has been strictly prepared on the latest 2026 syllabus for Class 12 Physics. Our expert teachers always suggest you to use these tools daily to make your learning easier and faster.
Chapter 3 Current Electricity Expert Notes & Solved Exam Questions
Our teachers have used the latest official NCERT book for Class 12 Physics to prepare these study material. We have included previous year examination questions and also step-by-step solutions to help you understand the marking scheme too. After reading the above chapter notes and solved questions also solve the practice problems and then compare your work with our NCERT solutions for Class 12 Physics.
Complete Revision for Physics
To get the best marks in your Class 12 exams you should use Physics Sample Papers along with these chapter notes. Daily practicing with our online MCQ Tests for Chapter 3 Current Electricity will also help you improve your speed and accuracy. All the study material provided on studiestoday.com is free and updated regularly to help Class 12 students stay ahead in their studies and feel confident during their school tests.
Our advanced study package for Chapter Chapter 3 Current Electricity includes detailed concepts, diagrams, Mind Maps, and explanation of complex topics to ensure Class 12 students learn as per syllabus for 2026 exams.
The Mind Maps provided for Chapter Chapter 3 Current Electricity act as visual anchors which will help faster recall during high-pressure exams.
Yes, teachers use our Class 12 Physics resources for lesson planning as they are in simple language and have lot of solved examples.
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Yes, our subject matter experts have updated the Chapter Chapter 3 Current Electricity material to align with the rationalized NCERT textbooks and have removed deleted topics and added new competency-based questions.