Class 7 Exam > Class 7 Videos > Science Class 7 > What is Electric Fuse?
What is Electric Fuse? Video Lecture | Science Class 7
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FAQs on What is Electric Fuse? Video Lecture - Science Class 7
| 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.
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Nov 24, 2024 Last updated |
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