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# ICSE Class 10 Physics Revision Notes Chapter 8 - Current Electricity

Last updated date: 12th Jul 2024
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## Revision Notes for ICSE Class 10 Physics Chapter 8 - Free PDF Download

Free PDF download of Class 10 Physics Chapter 8 - Current Electricity Revision Notes & Short Key-notes prepared by our expert Physics teachers as per CISCE guidelines. To register Physics Tuitions on Vedantu.com to clear your doubts.

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## Few topics of ICSE Class 10 Physics Current Electricity

ICSE Class 10 Physics Chapter 8 is on the topic ‘Current Electricity’. In this chapter, students will learn about various sub topics of Current Electricity like, electric current, Ohm’s Law, Resistance of a wire, potential and Potential Difference, etc.

Below are some topics which are present in ICSE Class 10 Physics Chapter 8 - Current Electricity.

1. Electric current

2. Ohm’s Law

3. Resistance and Resistivity

4. Conductance and Conductivity

5. Sums based on the above topics

### Short Notes for revision of ICSE Class 10 Chapter 8 Current Electricity

Below are some short notes on the above topics. Students can use these as revision notes.

1. Electric current - The amount of charge flowing through one cross section of a conductor is called Electric current. Its SI Unit is Ampere (A). Other units are kiloampere, mega ampere, micro ampere, milli ampere, etc.

2. Ohm’s Law: It states that the current flowing through a metallic conductor at constant temperature is directly proportional to the potential difference applied across its ends. Ohm’s Law is denoted as V= IR.

3. Resistance and Resistivity - The opposition to a current flow in a wire is called resistance. Its SI Unit is ohm.

Resistivity is the resistance offered by the wire of unit length and unit area of cross-section. Its SI unit is ohm meter.

1. Conductance and Conductivity - The reciprocal of resistance is called conductance and the reciprocal of resistivity is called conductivity.

To study well and prepare before an exam, you will need the assistance of the short revision notes for Class 10 ICSE Physics Chapter 8 Current Electricity.  These notes are compiled by the top subject matter experts of Vedantu for the benefit of the students. They can refer to it before an exam and can recapitulate the concepts easily.

## FAQs on ICSE Class 10 Physics Revision Notes Chapter 8 - Current Electricity

1. State Ohm’s Law mentioned in Revision Notes for ICSE Class 10 Physics Chapter 8 - Free PDF Download

It states that the current flowing through a metallic conductor at constant temperature is directly proportional to the potential difference applied to its ends. The proportionality constant is called the resistance of the conductor. The SI unit of resistance is Ohm. Ohm’s Law is applicable if and only if the temperature is constant.

Conductors which follow Ohm’s Law are called Ohmic conductors, ones that don’t follow Ohm’s law are called non-Ohmic conductors. There is also a special type of conductor, called the Superconductor. Superconductors are conductors which lose their resistance suddenly, in a drastic manner, at a very low temperature.

2. What are Resistance and Resistivity according to Revision Notes for ICSE Class 10 Physics Chapter 8 - Free PDF Download?

Resistance is the measure of the hindrance produced by the medium in which the current is flowing, to oppose the flow of current. Resistance of a wire depends on the length, thickness, temperature, and nature of a wire.

Resistivity is the resistance offered by the wire of one unit length and one unit area of cross-section. The resistivity of a wire depends on the material and temperature of the conductor. Both are very important in the flow of current through a wire.

3. What is internal resistance according to Revision Notes for ICSE Class 10 Physics Chapter 8 - Free PDF Download?

The resistance offered to the flow of current by the electrolyte inside the cell is called internal resistance. Internal resistance depends on a number of factors like the surface area of the electrodes, the distance between the electrodes, the nature and concentration of the electrolyte, and the temperature of the electrolyte. For instance, electrodes that have a large surface area have a smaller internal resistance. Another instance is if two electrolytes are present, and one of them has a higher concentration than the other, then it will have greater resistance than the other one.

4. What to do if students find ICSE Class 10 physics difficult?

The key to excelling in any subject is to study that subject thoroughly. If students find a subject difficult, they should devote more time to it by reading the books thoroughly, practicing sums, going through and understanding the concepts thoroughly, solving question papers, revising time and again, etc. To aid in the revision of students, Vedantu has ready revision notes for students, free of cost. These are prepared by professional experts in the subject, so students can use these for their revision without any second thought.

5. Why are Revision Notes for ICSE Class 10 Physics Chapter 8 - Free PDF Download important?

Revision notes are very important for a student, especially when they are in higher classes. In higher classes, it is not possible to read the entire book before the exams. In that case, revision notes help students a lot. They help students to concentrate and not get overwhelmed with information overload. They help students to retain information and also aid with their memory. Studying in a compact form before the exam helps the students to remember all the important information for exams.