Physics
X-rays region lies between

Ultraviolet and visible region
Short radio waves and long radio waves
Visible and infra-red region
Gamma-rays and ultraviolet region

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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
They make the electric equipments more reliable and easier for servicing
A faulty part of a conventional circuit may be difficult to locate and repair
All listed here

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