This is a doubt that even native English speakers have!
Electric and electrical are essentially the same - they refer to any device that uses electricity. Flashlights are electric; we also have electric lights and electric heaters, and nowadays even electric cars. Something that is electric just uses electricity for energy.
Something that is electronic is a more complex system - it manipulates the electrical energy in ways that allow for more advanced functions, such as
transmitting information. Computers are electronic, and we also use electronic for digital versions of things in the physical world, like electronic stores/books.
One arm chin ups are one of impressive exercises in existence, and elude many hardcore exercisers for years. To qualify as a real one arm chin up you shouldnt be holding on to the wrist of your working arm, which is what makes it so difficult. If youre interested in giving it a go, I recommend this tutorial by Al Kavadlo.