Create apparent_power.py

[rohan472000]

Describe your change:

• Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• Documentation change?

Checklist:

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• All new Python files are placed inside an existing directory.
• All filenames are in all lowercase characters with no spaces or dashes.
• All functions and variable names follow Python naming conventions.
• All function parameters and return values are annotated with Python type hints.
• All functions have doctests that pass the automated testing.
• All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
• If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

[EngineerMarek]

Shouldn't we call this something like abs_apparent_power? This is only the absolute value of apparent power calculated from the pythagorean theorem, but it does not include the phase. Though I don't know how you guys would like to implement complex numbers for that or if there is already an implementation/a standart for that

[cclauss]

Or should we raise ValueError("real_power must not be negative")

[rohan472000]

Shouldn't we call this something like abs_apparent_power? This is only the absolute value of apparent power calculated from the pythagorean theorem, but it does not include the phase. Though I don't know how you guys would like to implement complex numbers for that or if there is already an implementation/a standart for that

I tried to implement that, have a look.

[cclauss]

Awesome!! Thanks for your contribution.

[rohan472000]

The one thing that I forgot to ask for is a URL to a Wikipedia article or some other source that explains the algorithm and where/when it should be used. This can be a great help to visitors to our repo. If you create a pull request that adds https://en.wikipedia.org/wiki/AC_power#Apparent_power or something similar to the docstring then I will gladly review it.

sure...done that, please have a look.