I got that there are active and passive buzzers. But they look same. How to distinguish these guys?

I got that there are active and passive buzzers. But they look same. How to distinguish these guys?

| Ranking | Name | Answers |
|---|---|---|
| 1 | PCBWay Team | 8 |
| 2 | Engineer | 1 |
| 3 | Engineer | 1 |
| 4 | Dr. TRonik | 1 |
| 5 | John samathanam | 1 |