CBSE Class 12 Physics Current Electricity Formulae

Download CBSE Class 12 Physics Current Electricity Formulae in PDF format. All Revision notes for Class 12 Physics have been designed as per the latest syllabus and updated chapters given in your textbook for Physics in Class 12. Our teachers have designed these concept notes for the benefit of Class 12 students. You should use these chapter wise notes for revision on daily basis. These study notes can also be used for learning each chapter and its important and difficult topics or revision just before your exams to help you get better scores in upcoming examinations, You can also use Printable notes for Class 12 Physics for faster revision of difficult topics and get higher rank. After reading these notes also refer to MCQ questions for Class 12 Physics given on studiestoday

Revision Notes for Class 12 Physics Chapter 3 Current Electricity

Class 12 Physics students should refer to the following concepts and notes for Chapter 3 Current Electricity in Class 12. These exam notes for Class 12 Physics will be very useful for upcoming class tests and examinations and help you to score good marks

Chapter 3 Current Electricity Notes Class 12 Physics

class_12_physic_concept_63

class_12_physic_concept_64.PNG

1. What happens to the power dissipation if the value of electric current passing through a conductor of constant resistance is doubled.

external resistance. What will be the current in circuit? W is connected to a 3.9 W2. A cell of emf 2 V and internal résistance 0.1

3. Calculate the resistivity of a material of a wire 1 m long, 0.4 mm in diameter and having a resistance of 2 ohm.

4. In a potentiometer arrangement; a cell of emf 1.25 V gives a balance point at 35.0 cm length of the wire. If the cell is replaced by another cell and the balance point shifts to 63.0 cm, what is the emf of the second cell?

5. A current is maintained in a conductor of cross-section 10-4 m2. If the number density of free electrons be 9 x 1028 m-3and the drift velocity of free electrons be 6.94 x10 – 9 m/s, calculate the current in the conductor.

6. A silver wire has a resistance of 2.1 Ω at 27.5 0C, and a resistance of 2.7 Ω at 100 0C. Determine the temperature coefficient of resistivity of silver.

7. Three resistors 1 Ω, 2 Ω and 3 Ω are combined in series. (a) What is the total resistance of the combination? (b) If the combination is connected to a battery of emf 12 V and negligible internal resistance, determine the total current drawn from the battery.

8. (a) Three resistors 2 Ω, 4 Ω and 5 Ω are combined in parallel. What is the total resistance of the combination? (b) If the combination is connected to a battery of emf 20 V and negligible internal resistance and the total current drawn from the battery.

9. A Voltage of 30V is applied across a carbon resistor with first second and third rings of blue, black and yellow colours respectively. Calculate the value of current in mA, through the resistor.

10. In a meter bridge the balance point is found to be 39.5 cm from one end A, when the resistor Y is of 12.5Ω . Determine the resistance of X.

CBSE Class 12 Phyiscs - Current electricity Formulae

WORKSHEET (NUMERICALS) : LEVEL - II
1. A cell of emf 2 V and internal résistance 0.1 Ω is connected to a 3.9 Ω external resistance. What will be the p.d. across the terminals of the cell?

2. Out of the two bulbs marked 25W and 100W, which one has higher resistance.

3. A cell of 6 V and internal resistance 2Ω is connected to a variable resistor. For what value of current does maximum power dissipation occur in the circuit?

4. What is the largest voltage you can safely put across a resistor marked 98 Ω - 0.5 W?

5. Two heater wires of the same dimensions are first connected in series and them in parallel to a source of supply . What will be ratio of heat produced in two cases?

6. Using data given in graph determine (i) emf (ii) internal resistance of the cell.
(iii) For what current, does maximum power dissipation occur in the circuit?

CBSE Class 12 Phyiscs - Current electricity Formulae

7. You are given ‘n’ resistors each of resistance ‘r’. These are first connected to get of minimum possible resistance. In the second case these are again connected differently to get maximum possible resistance. Compute the ratio between the maximum and minimum values resistance so obtained.

8.Two primary cells of emf E1 and E2 (E1 > E2) are connected to the potentiometer wire as shown in the figure. If the balancing lengths for the cells are 250 cm and 400 cm. Find the ratio of E1 and E2.

CBSE Class 12 Phyiscs - Current electricity Formulae

9. Two identical cells of emf 1.5V each are joined in parallel providing supply to an external circuit consisting of two resistors of 13 each joined in parallel. A very high resistance voltmeter reads the terminal voltage of the cells to be 1.4V. Find the internal resistance of each cell.

10. Three cells of emf 2V, 1.8V and 1.5V are connected in series. Their internal resistances are 0.05Ω, 0.7Ω and 1Ω respectively. If this battery is connected to an external resistance of 4Ω, calculate :
(i) the total current flowing in the circuit. (ii) the p.d. across the terminals of the cell of emf 1.5V.

Please click the link below to download CBSE Class 12 Physics Current electricity Formulae

More Study Material

CBSE Class 12 Physics Chapter 3 Current Electricity Notes

We hope you liked the above notes for topic Chapter 3 Current Electricity which has been designed as per the latest syllabus for Class 12 Physics released by CBSE. Students of Class 12 should download and practice the above notes for Class 12 Physics regularly. All revision notes have been designed for Physics by referring to the most important topics which the students should learn to get better marks in examinations. Studiestoday is the best website for Class 12 students to download all latest study material.

Notes for Physics CBSE Class 12 Chapter 3 Current Electricity

Our team of expert teachers have referred to the NCERT book for Class 12 Physics to design the Physics Class 12 notes. If you read the concepts and revision notes for one chapter daily, students will get higher marks in Class 12 exams this year. Daily revision of Physics course notes and related study material will help you to have a better understanding of all concepts and also clear all your doubts. You can download all Revision notes for Class 12 Physics also from www.studiestoday.com absolutely free of cost in Pdf format. After reading the notes which have been developed as per the latest books also refer to the NCERT solutions for Class 12 Physics provided by our teachers

Chapter 3 Current Electricity Notes for Physics CBSE Class 12

All revision class notes given above for Class 12 Physics have been developed as per the latest curriculum and books issued for the current academic year. The students of Class 12 can rest assured that the best teachers have designed the notes of Physics so that you are able to revise the entire syllabus if you download and read them carefully. We have also provided a lot of MCQ questions for Class 12 Physics in the notes so that you can learn the concepts and also solve questions relating to the topics. All study material for Class 12 Physics students have been given on studiestoday.

Chapter 3 Current Electricity CBSE Class 12 Physics Notes

Regular notes reading helps to build a more comprehensive understanding of Chapter 3 Current Electricity concepts. notes play a crucial role in understanding Chapter 3 Current Electricity in CBSE Class 12. Students can download all the notes, worksheets, assignments, and practice papers of the same chapter in Class 12 Physics in Pdf format. You can print them or read them online on your computer or mobile.

Notes for CBSE Physics Class 12 Chapter 3 Current Electricity

CBSE Class 12 Physics latest books have been used for writing the above notes. If you have exams then you should revise all concepts relating to Chapter 3 Current Electricity by taking out a print and keeping them with you. We have also provided a lot of Worksheets for Class 12 Physics which you can use to further make yourself stronger in Physics

Where can I download latest CBSE Class 12 Physics Chapter 3 Current Electricity notes

You can download notes for Class 12 Physics Chapter 3 Current Electricity for latest academic session from StudiesToday.com

Can I download the Notes for Chapter 3 Current Electricity Class 12 Physics in Pdf format

Yes, you can click on the link above and download notes PDFs for Class 12 Physics Chapter 3 Current Electricity which you can use for daily revision

Are the revision notes available for Chapter 3 Current Electricity Class 12 Physics for the latest CBSE academic session

Yes, the notes issued for Class 12 Physics Chapter 3 Current Electricity have been made available here for latest CBSE session

How can I download the Chapter 3 Current Electricity Class 12 Physics Notes pdf

You can easily access the link above and download the Class 12 Notes for Physics Chapter 3 Current Electricity for each topic in Pdf

Is there any charge for the Class 12 Physics Chapter 3 Current Electricity notes

There is no charge for the notes for CBSE Class 12 Physics Chapter 3 Current Electricity, you can download everything free of charge

Which is the best online platform to find notes for Chapter 3 Current Electricity Class 12 Physics

www.studiestoday.com is the best website from which you can download latest notes for Chapter 3 Current Electricity Physics Class 12

Where can I find topic-wise notes for Class 12 Physics Chapter 3 Current Electricity

Come to StudiesToday.com to get best quality topic wise notes for Class 12 Physics Chapter 3 Current Electricity

Can I get latest Chapter 3 Current Electricity Class 12 Physics revision notes as per CBSE syllabus

We have provided all notes for each topic of Class 12 Physics Chapter 3 Current Electricity as per latest CBSE syllabus