Why Cu, Al are used over tungsten, Fe to make fuses?

They are cheap.

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They have low melting point.

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Fe, Ni are costly.

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Cu is a bad conductor.

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Solution

The correct option is B
They have low melting point.

Low melting point materials are used in fuses because large currents pass through the circuit. Thus, they create heat which is enough to melt a fuse. They break the circuit and save the appliances.

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