Home » mcq » physics » Safety fuse wire used in domestic electrical appliances is made of metal of low A. Resistance B. Melting point C. Specific gravity D. Conductance

Safety fuse wire used in domestic electrical appliances is made of metal of low A. Resistance B. Melting point C. Specific gravity D. Conductance

April 15, 2024 by rawan239

Resistance

Melting point

Specific gravity

Conductance

The correct answer is B. Melting point.

A fuse wire is a safety device that is used to protect electrical appliances from damage caused by an overload of current. The fuse

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wire is made of a metal with a low melting point, so that it will melt and break the circuit if the current becomes too high. This prevents the appliance from overheating and catching fire.

The other options are incorrect because:

Resistance: A metal with a low resistance would allow more current to flow, which would increase the risk of an overload.
Specific gravity: The specific gravity of a metal is its density relative to water. This has no effect on its melting point.
Conductance: The conductance of a metal is its ability to conduct electricity. This has no effect on its melting point.

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