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प्रश्न
How does an electric fuse prevent the electric circuit and the appliances from a possible damage due to short circuiting or overloading.
उत्तर
The fuse used in electrical circuits is a typical example of Joule's heating in action. It safeguards appliances and circuits by halting the flow of any excessively high electric current. The device and fuse are connected in series. It is composed of a wire made of a metal or alloy with an appropriate melting point, such as lead, copper, iron, or aluminium. The temperature of the fuse wire rises if a current greater than the allowed amount flows through the circuit. The fuse wire melts as a result, breaking the circuit. Typically, the fuse wire is enclosed in a porcelain or similar material cartridge with metal ends.
संबंधित प्रश्न
What happens to the resistance of the circuit during a short circuit?
What precaution should be taken to avoid the overloading of domestic electric circuits?
At the time of short circuit, the current in the circuit ______.
State whether the following statement is true or false.
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What is the electric potential of the wire in a mains supply cable?
Usually three insulated wires of different colours are used in an electrical appliance. Name the three colours.
Answer the following question:
What is overloading? When does it occur? How can overloading be avoided?
Write the function of the voltmeter in an electric circuit.
Earth wire carries ____________.
Why is it necessary to earth metallic appliances?
