Active or passive or past participle adjective?.

I am very very confused about active passive and past participle adjective.

I can’t easily understand some sentences are of passive or active.

e.g.

The device is no longer connected.
(Active or Passive or Past participle adjective)

This issue will only get reproduced if the following steps are done.
(Active or Passive or Past participle adjective).

Ask the waiter to switch off the lights if they are not needed.
(Active or Passive or Past participle adjective).

Consider it done.
(Active or Passive or Past participle adjective).

Internet connection got disconnected yesterday.
(Active or Passive or Past participle adjective).
Is there any rule(s) to identify active or passive voice or past participle adjectives?

This question is easy for you all. Please answer this question without any tease