Physics
Kepler's law of planetary motion states that the square of the time period is proportional to the

Fourth power of the semi-major axis
Cube of the semi-major axis
Square of the semi-major axis
Semi-major axis

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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
All listed here
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

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Physics
When a piece of pure silicon is doped with aluminium, then

The conductivity of the doped silicon piece will remain the same
The resistivity of the doped silicon piece will increase
The doped silicon piece will become p-type
The doped silicon piece will become n-type

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