A:AnswerThis cable will not work with the iPhone 11 because the iPhone 11 uses a lightning cable. However some of apples tablets like the current ipad air uses USB-C.
A:AnswerYes that should work to charge. It may or may not cause a slow charge rate, however.
I use it in my car for my phone with a 30W car charger and it doesnt charge super fast, but it does charge my phone pretty well.