Can a state pass a gun ban? Yes, but it would considered (by most people) unconstitutional. That's what the Heller lawsuit was about.
The people in DC decided to give up their right to decide what was best for themselves.
About 30 years ago, but I can't find an exact date.
Washington DC
A DC pass through will pass a DC voltage in only one direction. Bidirectional will let a DC voltage travel both directions.
simple capacitor can do this job (to block dc and pass ac).
DC refers to the District of Columbia, which is not a state.
No
stricter sentencing on gun related incidents?
DC. The District of Columbia is not part of any state, and uses DC in place of a state.
Chicago and Washington DC in the US
Usually just a 24 hour ban with an error
Washington dc