Q.

The properties of the fuse are


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a

The melting point should be low

b

High resistance of the wire

c

The wire should be economical

d

All of the above 

answer is D.

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Detailed Solution

The properties of the fuse are the melting point should be low, high resistance of the wire and the wire should be economical.
If positive and negative wires directly come in contact in a home, this situation is called a short circuit, which leads to the flow of heavy current through wires, and wires may get overheated and cause a fire. To stop any such situation, we use a fuse. A fuse is a wire made up of an alloy with the following properties- low melting point and high resistance, and a fuse should be economical.
  
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