What happens if they use a different thickness of fuse wire?

The resistance of a conductor is proportional to its length and inverse proportional to its cross-sectional area. So, If the fuse wires are thick, the larger cross section decreases the resistance across the fuse wire. So, even a high current flows through the fuse, it doesn’t blow out.

Should the fuse wire be thick or thin?

the fuse wire should be thin so that whenever extra current flows through the circuit,the wire should melt and break the circuit,to prevent electrical fires.

Why we use a thin wire as a fuse wire and not a thick wire?

In a fuse thin wires are used instead of thick wires because thin wires have high resistivity and low melting point. This ‘high resistivity and low melting point’ wires are often thin.

Can we use thick wire for fuse?

Fuse wires are used to isolate the circuit when high current flows. If fuse wires are thick, i.e., the area of cross section increases, resistance of fuse wire decreases. So, even if high current flows through the circuit, fuse doesn’t blows out.

Which fuse wire is thick 5A or 15A?

Question 16. Q16) Which fuse wire is thick: 5A or 15A? Solution: 15A wire is thick.

Why should we use a thin wire in a fuse?

A fuse is made of thin wire as it needs to be able to melt under high temperatures caused by high currents. If it does not melt the overcurrents caused by power surges can damage the circuit. The thicker the wire, the more current can flow and the harder it is to melt.

What is a fuse wire what is the advantage and disadvantage of using a thick fuse wire?

Explanation: The resistance of a conductor is proportional to its length and inverse proportional to its cross-sectional area. So, If the fuse wires are thick, the larger cross section decreases the resistance across the fuse wire. So, even a high current flows through the fuse, it doesn’t blow out.

Can we use 5A fuse at the 15A supply and why?

No. we can’t use 5 A fuse in carrying 15 A current because fuse will protect only till 5 A. if current exceeds than 5 A then it will be short circuit & further it may leads to fire .

Which fuse wire is thin 10a or 15A?

The wire A with 15 A rating is thicker. It is because, thicker the wire, less is the resistance and hence it can carry more current.

What happens if a thick copper wire is used as a fuse?

Copper has a higher melting point than the tin used in fuse wire. So, when a high level of current runs through copper wire, it continues to heat but will not melt. Instead, it causes a short circuit – potentially ruining your appliance and sparking a fire.

Why does a fuse wire have a lower melting point than connecting wires?

EXPLANATION: A fuse wire has high resistance and low melting point, this is because it prevents the flow of a higher current than a limited value.

What is a 5A fuse used for?

5A Fuse. Used mainly for lighting circuits.

Why are fuses thin in size?

If fuse wires are thick, i.e., the area of cross section increases, resistance of fuse wire decreases. So, even if high current flows through the circuit, fuse doesn’t blows out. Which means, it acts merely as a connecting wire and not a fuse wire. That’s why fuses are thin.

Should a fuse wire have a high or low resistance?

A fuse wire should not have high resistance or low resistance. It should have enough resistance to carry its rated current without unwanted disconnection and melt instantly for a small excess of current. That is the fuse thickness increases with the current rating.

Why do fuse wires have thick cross section?

So, If the fuse wires are thick, the larger cross section decreases the resistance across the fuse wire. So, even a high current flows through the fuse, it doesn’t blow out.

What is the material used to make a fuse?

Fuse Wire. A fuse is a piece of wire of a material with a very low melting point, that is, it melts and breaks as soon as its temperature gets higher than its melting point. The material used for making fuse have low melting points, hence fuse wires are mainly made up of tin, lead or zinc.