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# Electric Current and Its Effects Class 7 Notes CBSE Science Chapter 14 (Free PDF Download)

Last updated date: 02nd Aug 2024
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## Revision Notes for CBSE Class 7 Science Chapter 14 Electric Current and Its Effects - Free PDF Download

Class 7 Science teaches excellent concepts related to interesting topics that are crucial for a student to learn. One of the chapters in this syllabus is ‘Electric Current and Its Effects’. It is the 14th chapter of this syllabus that needs proper attention from the students. This chapter has to be studied properly to create a strong foundation of knowledge. This foundation will help students grasp the advanced concepts of electric current in the higher classes. To make this chapter easy to revise, the experts Vedantu have created simple Class 7 Science Chapter 14 notes to follow. These revision notes will be very useful for students to learn and remember these new concepts. It is available in PDF format. You can download it for free and access it offline when you are willing to study this chapter. The Class 7 Chapter 14 Science Notes are quite useful to study or revise quickly before an exam. Use it aptly and score well in the upcoming exams. Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. You can also download NCERT Solutions Class 7 Science and Class 7 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.

## Download CBSE Class 7 Science Revision Notes 2024-25 PDF

Also, check CBSE Class 7 Science revision notes for other chapters:

## Access Class 7 Science Chapter – 14 - Electric Current and Its Effects

• The flow of electrons across a conductor is known as electric current.

• The use of symbols to represent electric components is convenient. A circuit diagram can be used to represent an electric circuit using these.

• When an electric current is passed via a wire, it heats up. It's the current's heating impact. This effect can be used in a variety of ways.

• When enormous electric currents are pushed through wires constructed of specific materials, they melt quickly and shatter. Electric fuses, which prevent fires and damage to electrical appliances, are made from these materials.

• One cell's positive terminal is connected to the following cell's negative terminal. A battery is a collection of two or more cells in this configuration.

• A wire acts like a magnet when an electric current travels through it.

• A full path for the flow of electric current is referred to as an electric circuit.

• Components of an Electric Circuit: The following are components of an electric circuit:

1. Cell: A cell is a device that provides energy to allow current to flow.

2. Bulb: When an electric current passes through it, it illuminates.

3. Switch: Turns on or off the circuit.

4. Connecting Wires: These wires assist in the conduct of electric current and the completion of the circuit.

### Electric Current's Effects:

1. Heating Effect: When an electric current runs through a wire, it heats up. This is the electric current's heating impact. When current travels through an electric heater, a coil of wire called the element gets red hot. The quantity of heat generated by a wire is determined by the material, length, and thickness of the wire.

2. Fuse: A fuse is a safety device that protects an electric circuit from harm. A small wire is inserted into porcelain or insulating material to create it.

3. MCB: The abbreviation MCB stands for Miniature Circuit Breakers. When the current in a circuit reaches the safe limit, these switches automatically turn off.

• Magnetic effect occurs when an electric current travels across a wire. This is the electric current's magnetic effect. Hans Christian Oersted was the first to notice this.

• An electromagnet is a current-carrying coil of insulated wire wound around a piece of iron. It is a wire coil wound on a soft iron core that is used to separate magnetic material from garbage. Small electromagnets are used by doctors to remove small bits of magnetic material that have accidentally fallen into the eye. Electromagnets are also found in many toys.

## Electric Current and Its Effects: Class 7 Science Chapter 14 Revision Notes Summary

The 14th chapter will describe what a charge is and how it is formed. This charge flows in a conductor producing a current. Before plunging into the deeper concepts, first, study the basic ones and understand the features of charges produced in a conductor. The chapter will perfectly explain positive charges and negative charges. You will also learn that similar charges repel and opposite attracts.

The Electric Current and Its Effects Class 7 notes will then describe the different effects of electric current. You will learn the basic differences between insulators and conductors with proper examples. As you can see, it is a foundation chapter that needs absolute attention from your side to understand these new concepts. Discover how electric current produces heat while travelling in a conductor. Various factors determine the amount of heat produced in a conductor. Find out how these factors influence the heat produced and memorize. After completing this section, you can use the revision notes to recall the effects of these factors.

In the next section, you will study how an electric bulb produces light. Here, you will find a different set of features that a filament in an electric bulb should have to produce light continuously. By following the Science Class 7 Chapter 14 notes, you will be able to remember these conditions and answer questions accordingly.

In the same section, you will learn how an electric fuse saves all the appliances in a house from a power surge. The electric fuse wire is a conductor with salient features differing from that of the bulb filament. Learn the differences to remember how the electric conductor varies in both cases. Refer to the Ch 14 Class 7 Science notes to make it easier to understand. Next, you will learn how an electric current produces a magnetic effect around a conductor. The features of the magnetic field produced when an electric current passes through a conductor will be nicely explained. Attend the classroom sessions properly to find a proper explanation of these concepts.

You should solve all your queries related to these concepts on time. By referring to the Ch 14 Science Class 7 notes, you will be able to recall the main points of all these concepts without any hassle. In the next section, you will learn what magnetism is. here, the chapter will also explain what lightning is and how it occurs.

Learn how electromagnets are formed and what are their features. Find out how these magnets can be used for various purposes. This section will also discuss how the power of an electromagnet can be controlled using the magnetic induction effect of an electric current. Follow the simplest explanations in the Class 7 Chapter 14 Science notes to remember this new concept. Learn how permanent magnets differ from electromagnets.

Proceed to the part where you will come to know the electrical hazards to be safe in your environment. Electricity is the lifeline of modern civilization. We should be very cautious while using electricity.

## What are the Benefits of Referring to Vedantu’s Revision Notes for Class 7 Science - Electric Current and Its Effects?

Unlock the advantages of Vedantu's Revision Notes for Class 7 Science - Electric Current and Its Effects. Gain a clear understanding and boost your knowledge with concise and effective study material tailored for Class 7 Science learners.

• Provides quick, clear summaries of key concepts.

• Simplifies complex topics for better understanding.

• An efficient tool for last-minute exam prep.

• Enhances retention of crucial information.

• Supports effective exam preparation with key points and tips.

• Saves time by consolidating information.

• Prioritizes important topics and questions.

• Offers practical examples for real-world connections.

• Boosts student confidence for exams.

## Conclusion

For an enhanced comprehension of this subject, NCERT - Class 7 Science Chapter 14 - Electric Current and Its Effects, thoughtfully prepared by experienced educators at Vedantu, is your invaluable companion. These notes break down the complexities of “Electric Current and Its Effects” into easily digestible sections, helping you grasp new concepts and navigate through questions effortlessly and quickly at the last minute. By immersing yourself in these notes, you not only prepare for your studies more efficiently but also develop a profound understanding of the subject matter.

## FAQs on Electric Current and Its Effects Class 7 Notes CBSE Science Chapter 14 (Free PDF Download)

1. How Electromagnets Differ from Permanent Magnets?

If you follow the NCERT Class 7 Science Chapter 14 notes, you will learn that the power of permanent magnets cannot be altered whereas electromagnets can be controlled.

2. Why Should you Prefer Using Class 7th Science Chapter 14 Notes?

By using these notes, you can make your revision more efficient and faster to comprehend.

3. How can you Identify a Field Magnetic Caused by an Electric Current?

As per Class 7 Electric Current and Its Effects notes, you will need a magnetic needle to identify a magnetic field and its direction.

4. How does resistance impact electric current flow?

Resistance is a property that opposes the flow of electric current. According to Ohm's Law, the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to its resistance. Higher resistance reduces the current flow, and lower resistance allows more current to pass through. Understanding resistance is essential in designing circuits and selecting appropriate materials for conductors.

5. What is electric current, and how does it flow in a circuit?

Electric current is the flow of electric charge through a conductor. In a circuit, it flows from the positive terminal of the voltage source (like a battery) to the negative terminal. This flow is facilitated by the movement of electrons in the conductor. Think of it like a continuous loop – electrons move from the negative side of the battery, through the circuit components, and back to the positive side.