Open App

Class 7 Exam > Class 7 Videos > Science Class 7 (Old NCERT) > What is Electric Fuse?

What is Electric Fuse? Video Lecture | Science Class 7 (Old NCERT)

FAQs on What is Electric Fuse? Video Lecture - Science Class 7 (Old NCERT)

1. What is an electric fuse?

Ans. An electric fuse is a safety device that is used to protect electrical circuits from excessive current. It consists of a thin strip of metal that melts when the current flowing through it exceeds the rated value, thereby breaking the circuit and preventing any damage or fire.

2. How does an electric fuse work?

Ans. When the current flowing through an electric fuse exceeds its rated value, the strip of metal inside the fuse heats up due to the resistance. Once the temperature reaches a certain threshold, the metal strip melts and breaks the circuit, stopping the flow of current and protecting the electrical equipment.

3. What are the types of electric fuses?

Ans. There are several types of electric fuses, including cartridge fuses, plug fuses, and thermal fuses. Cartridge fuses are cylindrical in shape and can be easily replaced. Plug fuses are used in residential electrical systems and have a threaded base. Thermal fuses are non-replaceable and are designed to break the circuit when the temperature exceeds a certain limit.

4. What is the purpose of using an electric fuse?

Ans. The main purpose of using an electric fuse is to protect electrical circuits and equipment from excessive current. It acts as a safety device by breaking the circuit when the current exceeds the rated value, preventing any damage or fire. It also helps in identifying and resolving faults in the electrical system.

5. How to choose the right electric fuse for a circuit?

Ans. To choose the right electric fuse for a circuit, one should consider the maximum current that the circuit can handle, the voltage rating, and the type of equipment being used. The fuse should have a current rating slightly higher than the maximum expected current, but not too high to compromise safety. It is advisable to consult an electrician or refer to the manufacturer's guidelines for proper fuse selection.

About this Video

3K Views

4.78/5 Rating

Sep 24, 2025 Last updated

Related Exams

Class 7 Grade 7

Video Description: What is Electric Fuse? for Class 7 2025 is part of Science Class 7 (Old NCERT) preparation. The notes and questions for What is Electric Fuse? have been prepared according to the Class 7 exam syllabus. Information about What is Electric Fuse? covers all important topics for Class 7 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for What is Electric Fuse?.

Introduction of What is Electric Fuse? in English is available as part of our Science Class 7 (Old NCERT) for Class 7 & What is Electric Fuse? in Hindi for Science Class 7 (Old NCERT) course. Download more important topics related with notes, lectures and mock test series for Class 7 Exam by signing up for free.

Description

Video Lecture & Questions for What is Electric Fuse? Video Lecture | Science Class 7 (Old NCERT) - Class 7 full syllabus preparation | Free video for Class 7 exam to prepare for Science Class 7 (Old NCERT).

Information about What is Electric Fuse?

Here you can find the meaning of What is Electric Fuse? defined & explained in the simplest way possible. Besides explaining types of What is Electric Fuse? theory, EduRev gives you an ample number of questions to practice What is Electric Fuse? tests, examples and also practice Class 7 tests.

	Science Class 7 (Old NCERT) 111 videos\|286 docs\|28 tests

Science Class 7 (Old NCERT)

111 videos|286 docs|28 tests

Join Course for Free

Explore Courses for Class 7 exam

shortcuts and tricks

mock tests for examination