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CBSE Class 7 Science Electric Current and Its Effects Worksheets with Answers - Chapter 14 - PDF

Q: 2. There are many questions on the working of Electric bell. Can you please explain that in detail?

Here is the explanation of the working of an electric bell:When the Bell's switch is turned on, an electric current passes through the wire coil, causing the iron piece attached to it to behave as an electromagnet. As a result, the hammer is drawn towards the iron piece. As a consequence of the hammer striking the bell, a sound is created. The hammer travels away from the contact screw as it approaches the iron piece, breaking the circuit. The electromagnet loses its magnetic effect once the circuit breaks because the wire coil no longer receives any current. The hammer returns to its original position as a result. The iron strip then comes back into contact with the contact screw as the hammer falls back, completing the circuit. This turns the iron piece into an electromagnet once more, and the process repeats itself until the bell is turned off. As a result, the bell continues to ring incessantly.

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Electric Current And Its Effects

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CBSE Class 7 Science Electric Current and Its Effects Worksheets with Answers for Chapter 14 in PDF format to download prepared by expert Science teachers from the latest edition of CBSE(NCERT) books. Register Online for NCERT Solutions Class 7 Science tuition on Vedantu to score more marks in the CBSE board examination.

Worksheets are an important part of academic improvement. The easiest method to enhance and learn a chapter in greater depth is to answer questions. Make sure you're writing the solution on the worksheet as you work on it. This will not only increase your topic knowledge but also your ability to present your answers, which is crucial during an examination. MCQ and subjective questions are included in the Entrance worksheet.

Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. Maths Students who are looking for better solutions can download Class 7 Maths NCERT Solutions to help you to revise the complete syllabus and score more marks in your examinations.

Why Should One Solve Class - 7 Science Worksheets?

This Science subject in Class 7 has a variety of interesting chapters, with a few of them having numerical lines of two to three lines and the rest being theoretical. Begin by reading NCERT Chapter 1 and following the directions.

Make sure to include all significant points with a proper picture in your notes, and try to write down all important Science formulas individually.
Start practising the questions from the Class 7 Science worksheets once you've finished your chapter notes.
Do all of the questions in the textbook and make a list of essential points you notice while writing the answers to the questions in the textbook or on the worksheet.

Never miss a class in class 7 Science from your school or your tuition. If you are unable to attend the session for any reason, be sure to study the notes from the previous class.
Read the theory from your textbook right after class. NCERT textbooks are preferred. Read the theory in the NCERT textbook and try to make notes.

Topics in Chapter 14:

Electric Current and Its Effects in Class 7 Science is an essential chapter in Science. It covers the fundamentals of electronics, which are important in higher education. The key or important issues regarding chapter -14 are listed in the table below.

S.No	Topic Name
1	Symbols of Electronic Components
2	Heating effect of electric current
3	Magnetic effect of electric current
4	Electromagnet
5	Electric bell

Short Notes on Chapter -14 Electric Current and Its Effects:

Components and Their Symbols in Electronics:

An electronic component is a part of an electric circuit that facilitates its operation.
The electric circuit permits electricity to flow through it and is used to provide electricity for a variety of functions, including running electric motors, powering a lamp or fan, and producing heat.
The term "battery" refers to a collection of two or more cells. In a battery, one cell's negative terminal is linked to the next cell's positive terminal, and so on. Toys, remote controls, torches, and transistors are all devices that consume batteries.

Electric Current's Heating Effect:
A wire becomes heated when an electric current flows across it. The heating effect of electric current is what this is called. The amount of heat produced in the wire is determined by the following factors:
The wire's composition, length, and thickness are all factors to consider.
Many appliances, such as the following, rely on the heating effect of electric current.
Electric heaters, electric irons, electric stoves, geysers, electric coffee makers, toasters, and hair dryers are all examples of electric appliances.
When electricity flows through these elements, they produce a lot of heat. This quantity, however, may vary based on the device's requirements. This is because they include an element, which is a coil of wire. Various types, diameters, and lengths of wire are utilised in such appliances depending on the amount of heat required. When wires are heated, they can break down or melt.

The Heating Effect of Electric Current Causes Light to Be Produced in a Bulb:

A bulb's filament is a coiled wire that becomes heated when electricity is delivered through it. As a result, the filament glows, and light is created by the bulb.

What Exactly is an Electric Fuse?

An electric fuse is a device that protects against the damage that an excess of electric current might produce. When current is conducted through a wire, it heats up due to the heating action of the electric current. A wire, on the other hand, can melt or break if an excessive amount of electricity is sent through it.

A wire consisting of a metal or alloy with a low melting point forms the basis of the electric fuse. As a result, when a large amount of current is passed through the wire, it readily breaks down. The circuit of the fuse opens as the wire breaks, and no current travels through it. This can prevent a fire from forming owing to a short circuit caused by excessive electric current.

Electric Current's Magnetic Effect:

Electric current has a magnetic effect as it passes across a wire. Hans Christian Oersted, a scientist, discovered the magnetic effect of electric current.

When an electric current is passed through a wire positioned near the compass, the needle of the compass deflects, he discovered. This implies the needle is deflected by a magnetic field formed near the wire.

Electromagnet:

Every magnetic material has a magnetic field within which it can feel the effects of its magnetism. An electromagnet is a magnet that generates a magnetic field by using electric electricity.

Because of the magnetic influence of electric current, an electromagnet is generated.

Domestic items like electric bells employ electromagnets. They are employed in toys, in telecommunication equipment of all types, in cranes to separate magnetic materials from garbage and lift big objects, and by doctors to remove any magnetic materials that have fallen into our eyes.

Electric Bell:

The components of an electric bell are very important. The Electromagnet is made up of a coil of wire wound around an iron piece. A hammer is fastened to an iron strip (soft iron armature) that is connected to the wire coil. A contact screw that connects the iron strip to the contact screw. The wire coil and the contact screw are connected via a battery. A switch in the circuit's middle.

Class - 7 Science Worksheets:

To help you improve your grades in class, Vedantu has posted many academic resources for class 7 Science, including class 7 Science formulae, class 7 reference book solutions, and worksheets for class 7 Science. In addition, you can take a chapter-by-chapter online test for class 7 Science. Science worksheets for class 7 have been developed. Senior teachers from several schools provide solutions. To use these worksheets, you must do a few things, such as read the chapter and make sure you have reviewed the notes before attempting to solve the worksheet.

FAQs on CBSE Class 7 Science Electric Current and Its Effects Worksheets with Answers - Chapter 14 - PDF

1. Are Vedantu worksheets useful and worthy?

Vedantu is known for providing students with the most up-to-date materials and resources. There is no need to be concerned about the quality of Vedantu’s work. Worksheets specialists prepared CBSE Class 7 Science worksheets. Experts with a good personality and a depth of teaching experience. As a result, pupils will benefit from doing these worksheets and will strengthen their problem-solving abilities. Students can also get PDFs of questions from the CBSE Class 7 Science Chapter at any time and from any location.

2. There are many questions on the working of Electric bell. Can you please explain that in detail?

Here is the explanation of the working of an electric bell:

When the Bell's switch is turned on, an electric current passes through the wire coil, causing the iron piece attached to it to behave as an electromagnet. As a result, the hammer is drawn towards the iron piece.
As a consequence of the hammer striking the bell, a sound is created. The hammer travels away from the contact screw as it approaches the iron piece, breaking the circuit. The electromagnet loses its magnetic effect once the circuit breaks because the wire coil no longer receives any current.
The hammer returns to its original position as a result. The iron strip then comes back into contact with the contact screw as the hammer falls back, completing the circuit. This turns the iron piece into an electromagnet once more, and the process repeats itself until the bell is turned off. As a result, the bell continues to ring incessantly.

3. How are these class -7 Science worksheets helpful in preparing for exams?

Concentrate on the worksheet and answer all of the questions. Make a list of all the crucial concepts and points for a quick review; make sure you don't forget anything.

Make a curriculum plan and ask questions. Try to complete as many questionnaires as the sample papers from the previous year; this will help you determine how frequently the questions were asked.

For more such information, you can head on to the website of Vedantu where worksheets are available with proper solutions for the benefit of the students. Using another easy method, the students can also avail themselves of the worksheets of the various chapters in their books by downloading the Vedantu app from the Google Play Store.

4. What is CFL? Please explain this topic.

Compact Fluorescent Lamp is an acronym for CFL. The fluorescent coating within these bulbs improves the brightness of the light. CFLs conserve energy since they do not emit heat in addition to light. The heating effect of electric current is not used by CFLs. They don't have a filament within; instead, they have two light-producing electrodes. Ordinary bulbs, on the other hand, waste energy as they heat up throughout the illumination process. For more such interesting information, visit the website of Vedantu and pick up your desired topic.

5. What are the ideas covered in NCERT Solutions for Class 7 Science Chapter 14?

The following are the concepts covered in Chapter 14 of NCERT Solutions for Class 7 Science:

Electronic Components Symbols,
The electric current heating effect,
The electric current magnetic effect,
Electromagnet, and
Electric bell

For more such information, you can head on to the website of Vedantu where worksheets are available with proper solutions for the benefit of the students for free. Using another easy method, the students can also avail themselves of the worksheets of the various chapters in their books by downloading the Vedantu app from the Google Play Store.