Question

Define fuse give its addvantage and disadvantage of using thick wire

Answer 1

It is a safety device which is used to limit the current in an electric circuit.

Fuse wire is made up of an alloy of tin and lead. Because it has low melting point.

Higher the current rating, thicker is the fuse wire.

Answer 2

Answer:

A fuse is known as a safety device used in electrical circuits to protect short circuits and overloaded circuits. The disadvantage of using thick fuse wire is that a huge amount of current passes through the fuse causing an electrical fire whereas using fuse wires of adequate thickness prevents unnecessary melting of the fuse.

Explanation:

• A fuse isolates the electrical circuit from the source when current flow exceeds by melting.
• A fuse must have a low melting point and high resistance.
• The fuse wire is generally made up of tin or tin alloy.
• The fuse is the cheapest type of protection with no complexity and simple operation.
• The resistance is inversely proportional to the cross-section of the wires used, so thick wires mean low resistances.
• So, even if high current flows through the fuse, it will not melt thus causing damage to electrical devices during faults. This is the disadvantage of using thick fuse wires.
• Similarly, if the fuse wires are not thick enough, they will have high resistance, resulting in unwanted melting of the fuse. To prevent unwanted melting of fuse we need thick fuse wires.
• This is the advantage of thick fuse wire.

Thus, a fuse wire should not be too thick or too thin, it should be adequately thick to provide enough resistance to allow the rated current to flow without melting down.