A fuse is used in main electric supply as a safety device. Which one of the following statements about the fuse is correct?

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Q: 108 (IAS/1998)
A fuse is used in main electric supply as a safety device.
Which one of the following statements about the fuse is correct?

question_subject: 

Science

question_exam: 

IAS

stats: 

0,43,26,13,3,43,10

keywords: 

{'fuse': [0, 1, 0, 1], 'main electric supply': [0, 1, 0, 0], 'main switch': [0, 1, 0, 0], 'safety device': [0, 1, 0, 0], 'low melting point': [0, 1, 1, 3], 'high resistance': [0, 1, 1, 0], 'silver alloys': [0, 1, 0, 0], 'parallel': [0, 1, 3, 5]}

The correct statement about a fuse is that it must have a low melting point.

A fuse is a safety device used in electrical circuits to protect against excessive current flow. It is typically made of a metal or alloy with a low melting point, such as tin or copper. The fuse is connected in series with the circuit, and when the current exceeds a certain level, the heat generated by the current causes the fuse to melt and break the circuit. This action helps prevent damage to the electrical equipment and the risk of fire or electrical hazards.

The purpose of the low melting point is to ensure that the fuse will melt and break the circuit when the current exceeds the rated capacity. By melting at a specific temperature, the fuse provides a predictable and controlled response to protect the circuit.