What's the main difference between: I was charged with and I was in charge of?
Be charged with - means to be responsible, be in the command or in the control of something.
Apparently, they seem to perform the same function. Nevertheless, I presume "Be in charge of something" is used when the object is a noun -
- I am in charge of the work
Whereas "Be charged with something" is used when the object is a verb (which is always followed by -ING)
As you can see in here: charge - Cambridge
- I am charged with supervising the kitchen