Physics
An integrated circuit is more advantages than a coventional circuit because

If a part of the integrated circuit fails the entire circuit is simply replaced
A faulty part of a conventional circuit may be difficult to locate and repair
They make the electric equipments more reliable and easier for servicing
All listed here

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Physics
A Fuse wire is characterised by

Low resistance and low melting point
High resistance and low melting point
Low resistance and high melting point
High resistance and high melting point

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